[narrator] They're watching you.
More than 6,000 satellites circle the Earth.
Every day, they uncover new mysterious phenomena
that defy explanation.
Revealed from high in the sk
the secret Armageddon weapon
It could absolutely knock us back to the stone age.
[narrator] A mystery mountaintop tsunami.
You can't really wrap your head around what you're seeing.
[narrator] And the lost arm of the dead.
They're known for their fearsomeness
when called to battle.
[narrator] Baffling phenomenon.
Mysteries from space.
What on Earth are they?
May 8th, 2018.
A group of urban explorers
are trekking through the Russian Wilderness.
Heading for something weird revealed from the skies.
[man speaking]
[narrator] A drone, scannin a forest 33 miles to the west of Moscow,
has uncovered towering structures
hidden in a clearing.
[man] Now, this is just truly bizarre.
You have massive, kind of, industrial sized,
like, towers and pillars and coils.
And it's in the middle of nowhere.
[Guy Walters] These towers are really strangely shaped
And they've got this kind of bulbous hoops
that run right up the side.
[narrator] The towers are around 130 feet tall,
and form part of a three million sq ft compou
They look like some kind of strange '80s space weapon.
These towers are kept away from prying eyes.
So what I wanna know is, what are they trying to hide?
[man speaking]
[narrator] A ten-foot high fence forms a barrier
around the entire site.
Presence of fencing around the site
is suspicious.
That automatically makes me suspect
that maybe it's some sort of military facility.
[narrator] After finally gaining access,
the teams discovers that a fence
isn't the only thing guarding the site.
Let's go.
[narrator] Using the trees as cover,
the team heads for these structures
at the edge of the compound
[man speaking]
[chuckling]
Crazy place.
[narrator] The towers sit on giant tanks of viscous liquid.
[man speaking]
[narrator] If this is a military facility,
it's one with a highly unusual purpose.
[Walters] If you get a good look at this tower,
there appear to be, like, weird high-voltage equipment.
These installations have a very eerie similarity
to Tesla coils.
But why would they be built out in the middle of nowhere
in Russia?
[narrator] Declassified Soviet files
reveal that the drone has captured a bizarre reli
of one of the most extraordinary minds
of the 19th century.
Nicola Tesla is one of the true geniuses
of early electrical power.
He was a pioneer, whose inventions are still being studied today.
[thunderclap]
[narrator] Born during a lightning storm, in 1856,
Nicola Tesla was one of the most prolific
and innovative engineers in history.
During his career,
he developed over 300 inventions.
Including the alternating current
that still powers nearly eve modern electrical device.
The structures revealed from the skies
are the legacy of perhaps his most ambitious project.
[Ruben] One of the ideas Tesla was most obsessed with
was this idea of sending out electricity, wirelessly.
[Kourounis] He had grand plans
of beaming wireless electricity
all across the country, to every household.
[machinery whirring]
[narrator] As well as homes
the engineer hopes his wireless beams
will power planes and ships
Key to his plan is the Tesla coil,
which he develops in 1891.
[Cerveny] A Tesla coil basically acts
like a magnetic container.
It allows for electrical charge to build up
and then be released
in one big burst.
[narrator] In his early experiments,
Tesla successfully beams electricity
over a 130-foot distance.
In 1901,
he dramatically scales up his technology.
Constructing the 190-foot ta
Wardenclyffe Tower, on Long Island.
[Walters] Tesla designed this tower
to create this huge static charge
that would electrify the stations, thousands of miles away.
Tesla was attempting to, literally, electrify
the entire planet.
[narrator] Tesla runs out of money
before completing the tower
But he continues to develop his inventions
and allegedly accepts a $25,000 payment
from the Soviet Union.
The secret forest facility
is evidence that the Kremli later repurposed his inventi
for military purposes.
[Ruben] These towers are something called Marx Generators.
Which are giant machines for making artificial lightning.
[thunder clapping]
All the explorers have found is essentially a giant, outdoor lightning laboratory.
[narrator] The laboratory begins operations in the 1970s,
amid a major upgrade of the Soviet Air Force.
Older planes are being replaced
by a new generation of 2,000 mile per hour MiG-25 fighters.
The fastest combat aircraft on Earth.
But supersonic dives through electrically charged clouds
make these war machines vulnerable.
[Morgan] Aircrafts are often lost,
and experience a failure of systems,
as a result of lightning strikes.
[Munoz] It was imperative for the Soviet military
to understand how their aircraft reacted to lightning strikes.
and whether those planes could still complete their missions.
[narrator] To solve the problem,
engineers used this central tower
to generate and release
nine million volts of electricity.
Sparking 500-footlong lightning bolts
that strike aircrafts positioned below.
[man speaking]
Imagine having the power of Zeus.
And being capable of conjuring your own lightning bolts.
And directing them exactly where you want them to be.
That's what this facility does.
[narrator] Using science developed at the site in the image,
the Soviet Union amasses a fleet of 10,000 military planes,
the largest air force of any nation.
Yet, it appears,
the facility's role in clandestine Cold War experiments
doesn't end there.
[Morgan] Not terribly far aw is the footprint of this other, very large, building
Footprint suggests something that was very big
and very important.
[narrator] Soviet military documents
reveal something disturbing
[Munoz] This facility was actually used
for development of a next generation Soviet weapon.
When used as a weapon of war,
it could knock us back to the stone age.
[narrator] Coming up... Apocalypse America...
Everything would suddenly cease to be.
...and the spies who lost a nuke.
The CIA has somehow lost the key ingredient
of an atom bomb,
up on some desolate mountainside.
[narrator] Structures hidden in the Russian wilderness,
have lured urban explorers to a secret laboratory,
used for researching lightning strikes on fighter jets.
[narrator] The ghostly outli of another structure
reveals this site's most secretive work has been wiped from the map
Declassified records offer more clues.
[Morgan] If you'd been at this site in 1985,
what you'd have seen was this massive dome-shaped structure.
Bigger than anything like i in the world.
It could be seen for miles around.
[narrator] The dome that once stood here
was codenamed Allure.
And is rumored to have house a revolutionary Soviet weapo
Early on, in the Cold War period,
the main threat was nuclear.
As time went on, you saw the evolution of a different kind of threa
That was known as the EMP attack.
[narrator] The cataclysmic power of electromagnetic pulse weapons,
or EMPs,
is accidentally discovered by US scientists in 1962.
On July 9th,
the 1.4 megaton Starfish Prime nuclear warhead
detonates 240 miles above the Pacific.
This huge explosion generates this just enormous EMP,
sparking aurora though this planet's magnetic field
And it's frying electronic devices in Hawaii
That's 900 miles away.
[narrator] A year later, the US and the Soviets sign a treaty
prohibiting these kinds of high altitude atomic test
But with EMP's power now out in the open,
military forces on each side of the iron curtain
race to convert it into a battlefield weapon.
It was a period where weapons were being designed on both sides
to, potentially, take out the other
without triggering a global thermonuclear war.
[Ruben] An electromagnetic pulse
can be used as a very specific sort of weapon.
It's like a bomb for electrical components.
[narrator] The Soviet scientists' aim
is to develop a device
that can generate a burst of 50,000 volts.
Enough to cripple US electrical infrastructure
A report on its capability
sends shockwaves through Washington.
[Walters] That report, to Congress, makes really, really terrifying reading.
Just a single 1.4 megaton explosion
above Kansas
has the power to potentially bring down
the entire US power grid.
[Kourounis] No power. No electronics.
Nothing.
All of it, gone.
Because it was blown away by an electromagnetic pulse.
[narrator] Without this critical infrastructure
civilized society will soon descend into anarchy.
[glass shattering]
[Morgan] That is a terrifying thing to imagin
People living in rural area
might be able to weather this quite a bit better,
But people that are living in metropolitan areas,
they're going to suffer.
They're gonna suffer very, very quickly.
[narrator] In New York,
a 25-hour blackout in 1977
unleashes a wave of violenc across the city.
Causing $350 million worth of damage.
And leaving over 600 people injured.
If an EMP blast take out the current US grid for a year,
analysts estimate that ensuing bloodshed
will claim the lives of 90 percent of the population.
[Kourounis] An EMP is a weapon of mass confusion.
Our government, our society would basically
stop functioning.
It would so heavily disrupt daily life
that it would produce absolute mass chaos.
[narrator] How close the Soviets got
to perfecting their apocalypse device is unknown.
In the 1980s,
the dome in the image mysteriously implodes.
Taking its secrets with it.
Yet the presence of security personnel at the site
is worrying evidence
that experiments at the clandestine facility
continue to this day.
[Morgan] When I look at these structures,
I find that they provide,
sort of, this menacing narrative
about the world we are living in, right now
[narrator] Coming up...
The Sahara's extraterrestrial cove...
[Kourounis] It is extraordinary.
But these are clustered together
in the same pattern that galaxies have.
...and hunt for the emperor's hoard.
They thought they will find an immense room of treasure to make their fortune.
[narrator] February 8h, 2020
A satellite passing over
a seemingly endless desert in Sudan,
scans the ground 420 miles below.
[Bellinger] It's a desolate desert area.
where you wouldn't expect to find anything at all,
but...
...there are these swarms of dark dots,
all over the landscape.
[Anthony] Each one of these little dot is exactly the same.
And they seem to stretch out for miles.
[narrator] Analysis of the wider region reveals
10,000 similar stone structures,
covering an area three times the size of Los Angeles.
If these were homes, I would expect to see
roads, infrastructure, pathways, something.
But there is none of that.
Very mysterious.
[narrator] Archaeologist Klint Janulis
recognizes the strange desert features.
I've worked in areas that have structures like these,
in Saudi Arabia.
They look, to me, like Islamic burial mounds from the middle ages,
called qubba.
But rarely do you see them in such large numbers
spread out across such a vast area.
[narrator] The tombs sit in territories
controlled by a secretive tribespeople
called the Beja.
[Janulis] The Beja people have lived in this area for over 2,000 years.
There's very little known about them
because they were nomadic.
Leaving behind very little archaeological evidence.
[Bellinger] The Beja generally travel around,
living a pretty peaceful insular lifestyle.
But what they are most known for
is their fearsomeness when called to battle.
[narrator] One of the earlie example of Beja's ferocity
is documented in 250 BCE.
When Roman garrisons are sent to Sudan
to establish trade routes.
[Janulis] The Beja wanted to defend their land against Roman incursion.
So they used guerilla hit-and-run tacks.
And ambushed.
And the Beja attacks become so frequent and regular,
it actually forces the Romans to pull out of the area.
[narrator] Over the following centuries,
the Beja strike uneasy alliances
with the Romans and the Egyptians,
before taking on the largest empire in histor
[Janulis] In the 1880s,
the British colonial expansion was occurring in this region.
And these people, armed with spears, charged the British garrison
going right into gunfire.
Spears meet rifles and spears win.
It's pretty incredible.
[man] They resisted, time and again,
slaughtering thousands of British soldiers.
[narrator] The long history of the Beja
means the mysterious tombs captured from the skies
likely date back many centuries.
In 2021,
archaeologists deploy groundbreaking technology
to decode their unusual distribution.
One of the ways in which archaeologists have studied these tombs
is using a statistical method
known as the Neyman-Scott Cluster Process.
[narrator] The Neyman-Scott Cluster Process
looks for patterns in the cosmos
by charting the invisible forces that shape galaxies.
Applying the same technique to the Islamic tombs
reveals something astonishin
It's extraordinary, but these tombs are clustered together
in the same patterns that galaxies have.
[Janulis] It's almost as if the Beja have organized this graveyard
in a way that mirrors the cosmos, the stars.
[narrator] The Islamic worl has been a crucible of space science
for thousands of years.
And is knows as the birthplace of astronomy
From using the stars to understand which way to face Mecca for prayers,
or understanding time zones
the cosmos has always been interwoven with the Muslim faith.
Our understanding of the universe today
wouldn't be anywhere near where it is
without Muslim scholars.
[Horton] One possibility is that these clusters of tombs
reflect that same obsession
with the cluster in the stars
that they could see overhead, every night.
[narrator] Like celestial objects gravitating towards a star,
the tombs at the center of each cluster
appear to contain the remains of revered membe of the Beja people.
[Hunt] The connection to ancestors and lineage
is what becomes the, sort of, gravitational hub or pull
to build tombs
around your oldest, venerated ancestor.
[Anthony] As more and more generations are added,
the small clusters start to balloon into these super clusters.
[narrator] The structures in the image are the legacy
of an extraordinary desert people.
Revealed and decoded from space.
[Janulis] It could be the use of satellite images like this,
through which we unlock the secrets of the Beja.
[narrator] Coming up...
Disaster in the death zone.
Whatever happened must have been devastating.
[narrator] And the killer cross.
It left huge swaths of this land decimated.
[narrator] February 16th, 2021.
An eye in the sky moves over Northeastern Indi
As it scans the snow-capped Himalayan mountains,
it photographs an image that shocks scientists.
[Walters] The satellite is capturing this enormous wound
penetrating the snow.
[narrator] The mystery scar extends around 90 miles
down the frozen mountain.
Just the size and scope of this, it's just massive.
You can't really wrap your head around what you're seeing.
Whatever happened in this area must have been devastating.
[narrator] Emergency worker rush to the site.
They discover that millions of tons
of rock and water have engulfed local villages
Leaving over 200 people buried in its wake.
[Walters] What it's done is to devastate an entire valley.
And no one knows how or why it happened.
[narrator] Winter floods on this scale
are almost unheard of in the Himalayas.
When authorities turn to eyewitnesses,
some claim clandestine forces were responsible.
[Walters] A lot of locals believe that this disaster
is the legacy of a really bizarre sequence of events,
that occurred here, right at the height of the Cold War.
[narrator] Those events begin in 1964.
about 900 miles from the disaster zone.
When, on October 16th,
China shocks the world by successfully detonating
its first nuclear device.
[explosion]
[Munoz] That explosion set off alarm bells
among US Intelligence agencies,
and those of their allies.
[Walters] What it opens up is this really new and frightening dynamic
that hasn't been seen before in the Cold War.
[cheering]
[narrator] The CIA scramble to gather intelligence
on this secretive country's test program.
Finding it hard to gather information from within China,
the intelligence agency formulates an audacious plan
[Munoz] The CIA came up with an idea
that could only have been hatched during the Cold War.
Their idea was to establish a nuclear powered listening post,
high in the Himalayas.
These devices were intended to spy on Chinese nuclear tests.
And also missile firings.
On the plus side, if you have surveillance and reconnaissance equipment
powered by nuclear energy,
you never have to change the batteries on anything.
On the downside, if you do it wrong,
it could create a real catastrophe.
[narrator] In October, 1965
a joint American and Indian task force
hauls the surveillance equipment and seven plutonium fuel cel
up the mountain, next to the disaster zone in the image.
Named Nanda Devi,
its 25,000-foot summit has a direct line of sight
to Chinese nuclear tests.
[Walters] Their mission was espionage at altitude.
But it's a lot easier said than done.
They're hit with this massive double whammy.
Heavy snowfall and low oxygen levels.
[narrator] The perilous conditions
force the team to abandon their mission,
2,000 feet from the summit.
[Munoz] They ended up stashi all the nuclear material
in a mountain crevice.
Only to come back in the spring to continue the mission.
Now when they came back, they had a pretty startling discovery.
The capsules were gone.
[Walters] It's pretty astonishing
when you consider that the C
ha somehow lost a key ingredient of an atom bomb
up on some desolate mountainside.
[narrator] Plutonium fuel cells are unlikely to explode on their own.
But they release heat due to radioactive decay.
The nightmare scenario is that they've triggered
a catastrophic radioactive avalanche,
which then swept into the valley.
[Munoz] One of the major problems
is that if you pack a material that emanates heat,
into an area that is mostly consisting of ice and snow,
the ice and snow is going to melt.
[narrator] In the aftermath of the disaster,
investigators turn to images of the mountain
taken in the days leading up to the event.
Instead of melting snow,
they discover that a giant ice-covered slab of rock
one and a half times the size of the Eiffel Tower
has splintered off a cliff face, above the valley.
And it broke loose, just like that.
[rumbling]
Catastrophically moving down the valley,
almost vertically a mile.
[Kourounis] This is a truly enormous quantity of debris
That, at one point, was in near freefall.
[narrator] A freak sequence of events
sees the ten million ton mas of frozen rock and rubble
smash into the valley below
The impact releases energy
equivalent to 200,000 tons of TNT.
Liquefying the ice flow in an instant.
[Kourounis] What was originally an avalanche,
ed into a much more mobile flood
of slurry and pulverized rock.
[Cerveny] That allows the ro and rubble to hydroplane,
to kind of glide down the valley,
without any restraint.
[narrator] A rubble tsunami moving at nearly 60 miles per hour
engulfs the valley.
Destroying all in its path.
Just imagine looking up to see this avalanche
of debris and boulders
barreling down the mountain towards you
with zero chance of escape.
It must have been terrifying.
[narrator] As the authoritie search for the missing and the dead,
they evacuate more villages in the area.
With temperatures rising across the mountain range,
many fear this won't be the last time
those living here will face death from above.
[Cerveny] Although this was an event that was unprecedented,
the specter is that it might not be unprecedented in the future.
[narrator] Coming up...
Pennsylvania's ghosts of war
No surprise, that people sometimes refer to this region
as the arsenal of America.
[narrator] And the strange tale of Treasure lake.
I can see this image of a lake and then gone.
[narrator] May 9th, 2017.
An eye in the sky over Pittsburg, Pennsylvania
spots something strange in a suburb below.
[McRobbie] This is a really remarkable image.
You've got a very, very clear impression
of a circle with a cross
right through it.
What's even weirder is that within the pie slices
of this cross,
there appears to be some type of reddish coloration.
Looks like it might be liqui
[narrator] Historical satellite imagery adds to the mystery.
What we see is each of those sections of this cross,
they appear to be filling u with this reddish liquid.
And over time that liquid moves from place to place within the cross.
[narrator] Analysts suspect the giant cross
could be a relic of this city's remarkable history.
One which helped build the America we see today.
[Wakefield] Pittsburg was very well known for its steel industry.
And so that gives us a clue as to what might be going on here.
[narrator] Pittsburg's rise as a steel superpower
begins in the 1870s,
when thousands flock here to exploit its extensive coal reserves.
[Dennie] In order to make steel, you need a lot of coal.
Pennsylvania has a tremendous amount of coal
And there, you can essentially strip mine the surface.
[narrator] Thanks to Pittsburg's coal bonanza,
within 40 years, the city's population rocket
from 86,000 to half a million.
By the turn of the century,
its furnaces are producing 25 million tons
of steel a year.
[Wakefield] Steel productio is Pittsburg was massive.
This supported about half of America's need for steel,
just from Pittsburg alone.
There's a reason why the Pittsburg football team
is called the Pittsburg Steelers.
Pittsburg steel plays crucial role
in American industry
in the 19th and 20th centuries.
Providing the girders that are gonna help build factories
and skyscrapers.
[Kourounis] Things like the Empire State Building.
The skeletons of those historic, iconic structures,
Pittsburg steel.
[narrator] In the middle of the 20th century,
the city that helped build America,
plays a vital role in defending it.
During World War II, of course, the focus of the steel industry
shifted from constructing girders and beams for skyscrapers
to building things like tank and ships, and guns.
No surprise that people sometimes refer to this region
as the arsenal of America.
[narrator] Yet the structur in the image is evidence
that this economic boom did have a dark side.
[Anthony] As good as coal was for Pittsburg,
and the steel industry, in general,
it was not exactly easy on the environment.
The stripping for coal left huge swaths of this land decimated.
To make matters worse,
the burning of all that coal
turned Pittsburg's air toxic.
[narrator] During part of the 20th century,
thick smog forces Pittsburg's residents
to turn on street lights in the middle of the day.
These lethal levels of pollution
earned the city a new nickname.
"Hell with the lid off."
[narrator] All this pollutio has a devastating impact
on residents' health.
The most lethal fallout
is the rise in something called the Black Lung.
Where coal builds up in the lungs
scarring them.
[narrator] Even today,
air pollution is responsibl
for more premature deaths per capita
in Pennsylvania, than in any other US state.
The red liquid flowing through the mystery cross,
is testimony to another deadly legacy
of its industrial past.
[Wakefield] One of the byproducts of strip-mining coal,
is iron oxide.
And when iron oxide gets into the groundwater,
that's when you see that reddish color.
[narrator] Water flowing out of abandoned mines
can contain over 66 times the safe level of iron oxide.
Poisoning the drinking wate of millions of Pennsylvanian homes.
[Anthony] Too much iron oxide in the water supp
can disrupt liver functionin your stomach.
There's a whole range of health consequences.
[narrator] The structure in the image is used
to filter this noxious liqui
Cleaning 2,000 gallons of contaminated water a minute.
[Wakefield] The groundwater passes from one section to the other section
and through that process,
it filters out the iron oxide from the ground water.
[Anthony] The walls of this cross
are meant to act just like your coffee filter
The iron oxide starts at one side
and because the walls of this X are semi-permeable,
then the water can flow through
but the iron oxide is trapped on the other side.
[narrator] Over the past few years,
the giant cross has removed hundreds of tons of iron oxi
from Pittsburg's groundwater
Helping turn the tide on the city's toxic past.
To me, this is one of the coolest examples
of geoengineering that I've ever seen.
[Kourounis] As unusual as this cross looks from above
it's actually serving a very important purpose.
[narrator] Coming up...
The mystery of the vanishing lake.
It's almost as if someone pulled the plug
and drained the lake of all the water.
[narrator] July 11th, 2019.
A sequence of images captured high above
a remote mountain range in Northern Turkey
uncovers a mystery.
I can see the satellite image of a blue-green lake.
And then gone.
[McRobbie] It's almost as if someone pulled the plug,
and drained the lake of all the water.
[narrator] In less than 48 hours,
millions of gallons of wate
have vanished.
[Kourounis] The biggest irony of this,
that the lake is called Dipsiz gol,
which translates to bottomless lake.
To lose a deep lake like that
is-- is rather inexplicable
[narrator] Reports from local newspapers
reveal that the disappearing act
is the culmination of a stor
that unfolds over more than 2,000 years.
[Kourounis] It's so crazy.
This story has a bit of everything.
A mysterious vanishing lake, a treasure hunt.
It is all kinds of history and mythology buried in the sands of time
[narrator] The tale begins in the second century CE.
[McRobbie] At the time, this region of Turkey
was famous for gold and silver mining.
And this particular area was a hub of that kind of activity.
[Hunt] The rivers that flow out of this northeastern part of Turkey
are rich in gold.
This is where, according to myth
the golden fleece originates
[narrator] According to the ancient Greeks,
the golden fleece was the wool of a sacred ram.
Stolen from a dragon by Jason and his Argonauts.
Recent archaeological studie in Turkey
suggest there may be some truth to this legend.
[Hunt] It turns out,
that it's where in the streams
people put down heavy sheepskin
with heavy wool.
that the gold float into.
Catching the gold in the curls of wool.
[narrator] In the year 117 A
reports of these riches lur Roman invaders to the area.
These legions were formed by Octavian,
also known as Augustus,
the first emperor of Rome.
A man who has risen to power
following one of the most infamous killings in history
The assassination of Julius Caesar
is followed by a civil war between his successors.
Ultimately,
Octavian, his grandnephew,
takes over the reins.
[Nardi] Octavian was the adopted heir of Julius Caesar.
And really, his goal was to flip the republic into an empire.
[narrator] To fund their empire building,
the Romans need to fill their war chest.
So, the gold mines of Turke are put under the protectio
of some of their most elite forces.
The feared 15th Apollinaris legion.
[Horton] That legion had a huge fortress quite close to this lake,
where the soldiers lived,
and defended the Eastern Frontier
of this part of the Roman Empire.
This lake is also approximately where these ancient gold mines were.
[narrator] Turkey's mines help the empire
accumulate around half a billion dollars worth of gold a year.
The Romans finally abandon the area in the seventh century.
But some locals suspected they left stashes of gold behind.
Hidden in abandoned mineshafts.
[Kourounis] As it turns out
there were rumors swirling around
that one of these ancient Roman goldmines
was buried or hidden underneath the waters of this lake
[McRobbie] It's believed that the lost treasure
of Octavian's 15th legion was there.
[narrator] In November 2019
treasure hunters drain the lake.
And begin digging for the go they hope lies buried below
They thought they will find an immense Roman treasure
to make their fortune.
[Kourounis] Over the span of just four days,
they excavated this entire lake.
And found absolutely nothing.
[narrator] Instead of uncovering a lost mine,
the treasure hunters have destroyed 12,000 years of history.
[Kourounis] This site wasn't a mine at all.
Turns out, this lake was formed
by receding glaciers during the ice age.
[Dennie] It's an unfortunate thing
that we've lost 12,000 years of water,
looking for a mine that didn't exist.
And now we lost a lake too.
[narrator] Multimillion-dollar trove or fool's gold?
The hunt for the legion's lost hoard continues.
[McRobbie] Maybe there stil are ancient Roman mines in Turkey,
waiting to be discovered.
But this lake wasn't one of them.