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Secrets of the Underground

To search for cluesabout what caused a 6,000-year-old laketo suddenly vanish

to search for clues
about what caused a 6,000-year-old lake
to suddenly vanish

Full Transcript

00:00:01.000 --> 00:00:02.088
..to search for clues about what caused
00:00:02.096 --> 00:00:05.024
a 6,000-year-old lake to suddenly vanish.
Duration
5 seconds
Views
21
Timestamp in Movie
00:23:05
Uploaded
Jul 13, 2025
Season
1
Episode
3
Genres
documentary

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Movie Summary

Using cutting-edge technologies such as ground penetrating radar (GPR), LIDAR (Light Detection and Ranging), and 3-D imaging, scientists research fascinating underworlds of secret tunnel networks, ancient structures, and bizarre g...
S01 • E02 Whoa. And do you know where they lead by chance? I mean, where... - Secrets of the Underground 00:04
Whoa. And do you know where they lead by chance? I mean, whe...
S01 • E08 While searching for shipwrecks, a group of underwater archaeologists - Secrets of the Underground 00:07
While searching for shipwrecks, a group of underwater archae...
S01 • E02 We don't know exactly. Really? - Secrets of the Underground 00:04
We don't know exactly. Really?
S01 • E07 I have no idea how To interpret this structure. - Secrets of the Underground 00:04
I have no idea how To interpret this structure.
S01 • E02 It's strange that people seem to know these tunnels exist, - Secrets of the Underground 00:08
It's strange that people seem to know these tunnels exi...
S01 • E07 It does not look like Anything I have ever seen. - Secrets of the Underground 00:04
It does not look like Anything I have ever seen.
S01 • E08 Sonar scans of the lake bottom revealed - Secrets of the Underground 00:11
Sonar scans of the lake bottom revealed
S01 • E07 Who built these structures And why? - Secrets of the Underground 00:05
Who built these structures And why?
S01 • E01 So it seems the party crowd of the Prohibition era - Secrets of the Underground 00:08
So it seems the party crowd of the Prohibition era
S01 • E03 I'm at Mountain Lake in Virginia trying to solve a perplexing mystery, - Secrets of the Underground 00:12
I'm at Mountain Lake in Virginia trying to solve a perp...
S01 • E07 Was this a colonial settlement, - Secrets of the Underground 00:11
Was this a colonial settlement,
S01 • E02 I team up again with my technician Stefan Burns to get a closer look. - Secrets of the Underground 00:05
I team up again with my technician Stefan Burns to get a clo...
S01 • E01 Now, from the urban underbelly of the heartland - Secrets of the Underground 00:08
Now, from the urban underbelly of the heartland
S01 • E08 The rocks also lie in close proximity to tribal land, - Secrets of the Underground 00:12
The rocks also lie in close proximity to tribal land,
S01 • E03 To try to answer these questions, - Secrets of the Underground 00:05
To try to answer these questions,
S01 • E07 That it was built almost 1,000 years before columbus. - Secrets of the Underground 00:04
That it was built almost 1,000 years before columbus.
S01 • E01 Just outside Olympia, Washington, sits an almost otherworldly site... - Secrets of the Underground 00:05
Just outside Olympia, Washington, sits an almost otherworldl...
S01 • E03 Geophysicist Tim Bechtel, - Secrets of the Underground 00:09
Geophysicist Tim Bechtel,
S01 • E07 What this reminds me of is Some sort of medieval structure. - Secrets of the Underground 00:05
What this reminds me of is Some sort of medieval structure.
S01 • E07 Are these ruins harboring An incredible secret? - Secrets of the Underground 00:04
Are these ruins harboring An incredible secret?