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So why was it built? And could it be hiding something?
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Secrets of the Underground

So why was it built?And could it be hiding something?

So why was it built?
And could it be hiding something?

Full Transcript

00:00:01.000 --> 00:00:04.012
So why was it built? And could it be hiding something?
Duration
4 seconds
Views
14
Timestamp in Movie
00:17:05
Uploaded
Jul 10, 2025
Season
1
Episode
2
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 So far, I found a lot of smoke, But not much fire, - Secrets of the Underground 00:08
So far, I found a lot of smoke, But not much fire,
S01 • E08 And between the scan of the yard - Secrets of the Underground 00:11
And between the scan of the yard
S01 • E01 It's said that when cops raided the joint, - Secrets of the Underground 00:08
It's said that when cops raided the joint,
S01 • E03 ..when you start to look at those kinds of outcomes... Right. - Secrets of the Underground 00:04
..when you start to look at those kinds of outcomes... Right...
S01 • E03 ..then the chances of this being a random accident - Secrets of the Underground 00:09
..then the chances of this being a random accident
S01 • E08 But as exciting as these results are, they aren't conclusive. - Secrets of the Underground 00:05
But as exciting as these results are, they aren't concl...
S01 • E01 From there he could slip into various buildings connected to the tunnels - Secrets of the Underground 00:07
From there he could slip into various buildings connected to...
S01 • E08 We now know there are air gaps under the rec yard - Secrets of the Underground 00:06
We now know there are air gaps under the rec yard
S01 • E08 But the GPR data didn't give us enough detail - Secrets of the Underground 00:06
But the GPR data didn't give us enough detail
S01 • E03 Physical evidence of a mass murder in Pennsylvania - Secrets of the Underground 00:08
Physical evidence of a mass murder in Pennsylvania
S01 • E01 It may sound like the stuff of Hollywood movies, - Secrets of the Underground 00:09
It may sound like the stuff of Hollywood movies,
S01 • E02 (DEEPER THUDDING SOUNDS) - Secrets of the Underground 00:07
(DEEPER THUDDING SOUNDS)
S01 • E08 So, I've got to find some other way at peering underneath Alcatraz - Secrets of the Underground 00:09
So, I've got to find some other way at peering undernea...
S01 • E01 Since ancient times, catacombs in Rome and Paris - Secrets of the Underground 00:10
Since ancient times, catacombs in Rome and Paris
S01 • E07 From this vantage point, - Secrets of the Underground 00:04
From this vantage point,
S01 • E02 I want to know if the tunnel we're in continues beyond this wall - Secrets of the Underground 00:06
I want to know if the tunnel we're in continues beyond ...
S01 • E08 While digging for new research about Alcatraz, - Secrets of the Underground 00:08
While digging for new research about Alcatraz,
S01 • E07 Over the last 20 years or so. - Secrets of the Underground 00:04
Over the last 20 years or so.
S01 • E02 Because if it does, that could lend credence to the rumours - Secrets of the Underground 00:07
Because if it does, that could lend credence to the rumours
S01 • E01 And even in our time, infamous Mexican drug lord El Chapo Guzman - Secrets of the Underground 00:12
And even in our time, infamous Mexican drug lord El Chapo Gu...