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And if so, what exactly could they be for?
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Secrets of the Underground

And if so,what exactly could they be for?

And if so,
what exactly could they be for?

Full Transcript

00:00:01.000 --> 00:00:04.024
And if so, what exactly could they be for?
Duration
4 seconds
Views
17
Timestamp in Movie
00:16:47
Uploaded
Jul 13, 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 • E01 It seems clear that at some point - Secrets of the Underground 00:09
It seems clear that at some point
S01 • E02 Just under where Stefan is standing, the tunnel ends at a wall. - Secrets of the Underground 00:05
Just under where Stefan is standing, the tunnel ends at a wa...
S01 • E03 ..the bone actually doesn't fracture or fall apart, it distorts. - Secrets of the Underground 00:06
..the bone actually doesn't fracture or fall apart, it ...
S01 • E07 Is just a small fraction Of that, - Secrets of the Underground 00:05
Is just a small fraction Of that,
S01 • E08 I came to Alcatraz very sceptical - Secrets of the Underground 00:07
I came to Alcatraz very sceptical
S01 • E02 However, something about the wall looks conspicuous, - Secrets of the Underground 00:07
However, something about the wall looks conspicuous,
S01 • E01 When it came to the art of eluding capture, - Secrets of the Underground 00:05
When it came to the art of eluding capture,
S01 • E08 But ground penetrating radar is now allowing us to see - Secrets of the Underground 00:06
But ground penetrating radar is now allowing us to see
S01 • E01 At the famous Green Mill Cocktail Lounge in his native Chicago, - Secrets of the Underground 00:09
At the famous Green Mill Cocktail Lounge in his native Chica...
S01 • E02 So why was it built? And could it be hiding something? - Secrets of the Underground 00:04
So why was it built? And could it be hiding something?
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 • 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,