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It's almost hard to imagine that 80ft over our head
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Secrets of the Underground

It's almost hard to imaginethat 80ft over our head was the old surface of this lake

It's almost hard to imagine
that 80ft over our head was the old surface of this lake

Full Transcript

00:00:01.000 --> 00:00:05.064
It's almost hard to imagine that 80ft over our head
00:00:05.072 --> 00:00:07.006
was the old surface of this lake.
Duration
8 seconds
Views
15
Timestamp in Movie
00:21:37
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 • E01 He was said to stand around 5'10" and weigh as much as 260lbs. - Secrets of the Underground 00:05
He was said to stand around 5'10" and weigh as muc...
S01 • E08 So that must be why the only prisoners ever to escape from The Rock - Secrets of the Underground 00:07
So that must be why the only prisoners ever to escape from T...
S01 • E07 Because as we've seen, - Secrets of the Underground 00:05
Because as we've seen,
S01 • E02 It's filled in with cobblestone and sandy dirt, - Secrets of the Underground 00:08
It's filled in with cobblestone and sandy dirt,
S01 • E03 This is like basically at the bottom of where the old lake was. - Secrets of the Underground 00:06
This is like basically at the bottom of where the old lake w...
S01 • E01 It would have been especially tight for someone the size of Capone, - Secrets of the Underground 00:07
It would have been especially tight for someone the size of ...
S01 • E08 In 1962, three inmates dug through their cell walls with sharpened spoons - Secrets of the Underground 00:13
In 1962, three inmates dug through their cell walls with sha...
S01 • E03 What makes this puzzle even weirder - Secrets of the Underground 00:07
What makes this puzzle even weirder
S01 • E01 We've got stairs right there, - Secrets of the Underground 00:12
We've got stairs right there,
S01 • E07 In superheated ground water, Toxic-gas emissions, - Secrets of the Underground 00:08
In superheated ground water, Toxic-gas emissions,
S01 • E02 (EXHALES) - Secrets of the Underground 00:06
(EXHALES)
S01 • E03 Today, it's only about 30% as deep as it was when it was full. - Secrets of the Underground 00:06
Today, it's only about 30% as deep as it was when it wa...
S01 • E08 They then made their way to the bay where they set sail on a makeshift raft, - Secrets of the Underground 00:07
They then made their way to the bay where they set sail on a...
S01 • E02 But I can see a ceiling to this. - Secrets of the Underground 00:04
But I can see a ceiling to this.
S01 • E02 I don't want to hit the wrong thing and make it all collapse. - Secrets of the Underground 00:04
I don't want to hit the wrong thing and make it all col...
S01 • E03 When this 47-acre lake dried up in 2008, business did, too, - Secrets of the Underground 00:12
When this 47-acre lake dried up in 2008, business did, too,
S01 • E08 The following year, The Rock closed its doors forever. - Secrets of the Underground 00:05
The following year, The Rock closed its doors forever.
S01 • E01 So if there really was a staircase here, - Secrets of the Underground 00:06
So if there really was a staircase here,
S01 • E07 An unprecedented glimpse Of the turbulent and fiery world. - Secrets of the Underground 00:05
An unprecedented glimpse Of the turbulent and fiery world.
S01 • E08 (GULLS CAWING) - Secrets of the Underground 00:07
(GULLS CAWING)