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Who built these structures And why?
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Secrets of the Underground

Who built these structuresAnd why?

Who built these structures
And why?

Full Transcript

00:00:01.000 --> 00:00:04.969
Who built these structures And why?
Duration
5 seconds
Views
13
Timestamp in Movie
00:23:19
Uploaded
Jul 13, 2025
Season
1
Episode
7
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 • 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 • E01 ..a sprawling plain covered by earthen mounds, - Secrets of the Underground 00:09
..a sprawling plain covered by earthen mounds,
S01 • E07 Are these ruins harboring An incredible secret? - Secrets of the Underground 00:04
Are these ruins harboring An incredible secret?
S01 • E03 And team geologist Paki Stephenson - Secrets of the Underground 00:08
And team geologist Paki Stephenson
S01 • E08 Some even believe they can decipher a man-made carving - Secrets of the Underground 00:06
Some even believe they can decipher a man-made carving
S01 • E02 I can't tell if the tunnel behind this door - Secrets of the Underground 00:12
I can't tell if the tunnel behind this door
S01 • E07 To detect details that haven't Been seen in centuries. - Secrets of the Underground 00:04
To detect details that haven't Been seen in centuries.
S01 • E03 Water was leaking out through four large funnels at the bottom. - Secrets of the Underground 00:05
Water was leaking out through four large funnels at the bott...
S01 • E08 For starters, if this is man-made, how did it get 40ft underwater? - Secrets of the Underground 00:06
For starters, if this is man-made, how did it get 40ft under...
S01 • E03 We set up on a pontoon boat, - Secrets of the Underground 00:06
We set up on a pontoon boat,