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We're actually one-and-a-half floors underground
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Secrets of the Underground

We're actuallyone-and-a-half floors underground, and the poker roomis straight up the...

We're actually
one-and-a-half floors underground, and the poker room
is straight up the shaft from here

Full Transcript

00:00:01.000 --> 00:00:04.024
We're actually one-and-a-half floors underground,
00:00:04.032 --> 00:00:07.004
and the poker room is straight up the shaft from here.
Duration
7 seconds
Views
13
Timestamp in Movie
00:19:54
Uploaded
Jul 09, 2025
Season
1
Episode
1
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 • E07 We'll be able to detect If there's liquid underground. - Secrets of the Underground 00:05
We'll be able to detect If there's liquid undergro...
S01 • E03 And though we may never know for certain what really happened to the workers, - Secrets of the Underground 00:17
And though we may never know for certain what really happene...
S01 • E08 From here, we can look at Alcatraz and how it's changed. - Secrets of the Underground 00:04
From here, we can look at Alcatraz and how it's changed...
S01 • E02 One of the buildings rumoured to have a tunnel entrance beneath it - Secrets of the Underground 00:06
One of the buildings rumoured to have a tunnel entrance bene...
S01 • E08 This digital model is still a work in progress, - Secrets of the Underground 00:06
This digital model is still a work in progress,
S01 • E02 Yeah, we do have a door down there, - Secrets of the Underground 00:05
Yeah, we do have a door down there,
S01 • E07 To identify variations Beneath earth's surface. - Secrets of the Underground 00:04
To identify variations Beneath earth's surface.
S01 • E08 But I'm hoping it can shed light on those anomalies we found in the dungeon - Secrets of the Underground 00:07
But I'm hoping it can shed light on those anomalies we ...
S01 • E02 I think it used to go to a tunnel, maybe. We don't open it any more. - Secrets of the Underground 00:04
I think it used to go to a tunnel, maybe. We don't open...
S01 • E08 Could they really be remnants of a legendary escape route? - Secrets of the Underground 00:04
Could they really be remnants of a legendary escape route?
S01 • E07 This is a technology That can plot out areas. - Secrets of the Underground 00:04
This is a technology That can plot out areas.
S01 • E03 They died doing hard work, doing their job and making America. - Secrets of the Underground 00:05
They died doing hard work, doing their job and making Americ...
S01 • E01 If you look here, you can see the wood steps on the bottom, - Secrets of the Underground 00:09
If you look here, you can see the wood steps on the bottom,
S01 • E02 OK, watch your head down here, this basement's really old and low. - Secrets of the Underground 00:04
OK, watch your head down here, this basement's really o...
S01 • E07 Tens of thousands of feet deep, - Secrets of the Underground 00:05
Tens of thousands of feet deep,
S01 • E08 All right, so zoom in there a little bit. - Secrets of the Underground 00:04
All right, so zoom in there a little bit.
S01 • E08 In this area underneath the rec yard, - Secrets of the Underground 00:06
In this area underneath the rec yard,
S01 • E07 In deadly Geologic activity here. - Secrets of the Underground 00:04
In deadly Geologic activity here.
S01 • E08 What's going on? Like, are they some sort of tunnels? - Secrets of the Underground 00:04
What's going on? Like, are they some sort of tunnels?
S01 • E03 Now from this hallowed ground outside of Philly, - Secrets of the Underground 00:11
Now from this hallowed ground outside of Philly,