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It could take me days to explore all these tunnels
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Secrets of the Underground

It could take me daysto explore all these tunnels, so I need a faster way to understand...

It could take me days
to explore all these tunnels, so I need a faster way to understand the full scope
of this underground network

Full Transcript

00:00:01.000 --> 00:00:03.092
It could take me days to explore all these tunnels,
00:00:04.000 --> 00:00:05.056
so I need a faster way
00:00:05.064 --> 00:00:08.006
to understand the full scope of this underground network.
Duration
9 seconds
Views
24
Timestamp in Movie
00:14:04
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 • E08 These are powerful enough to penetrate concrete, - Secrets of the Underground 00:08
These are powerful enough to penetrate concrete,
S01 • E07 Look at this. It's completely smooth bark. - Secrets of the Underground 00:04
Look at this. It's completely smooth bark.
S01 • E01 It can also be used on a macro scale, - Secrets of the Underground 00:11
It can also be used on a macro scale,
S01 • E07 This is completely pristine. - Secrets of the Underground 00:04
This is completely pristine.
S01 • E03 The site lies on private railroad property - Secrets of the Underground 00:08
The site lies on private railroad property
S01 • E02 Is there a map that I could look at to figure out - Secrets of the Underground 00:05
Is there a map that I could look at to figure out
S01 • E07 Now, the other thing That comes to mind is - Secrets of the Underground 00:07
Now, the other thing That comes to mind is
S01 • E02 To my knowledge, there's no comprehensive map - Secrets of the Underground 00:05
To my knowledge, there's no comprehensive map
S01 • E08 GPR does all the work for you, you just got to be able to interpret it. - Secrets of the Underground 00:05
GPR does all the work for you, you just got to be able to in...
S01 • E03 So we won't be able to confirm for sure - Secrets of the Underground 00:09
So we won't be able to confirm for sure
S01 • E01 Today, though, we'll use it to scan Capone's second-floor hideout, - Secrets of the Underground 00:18
Today, though, we'll use it to scan Capone's secon...
S01 • E07 When you have a fire, - Secrets of the Underground 00:07
When you have a fire,
S01 • E02 I don't know why there's not a map of the tunnel system, - Secrets of the Underground 00:07
I don't know why there's not a map of the tunnel s...
S01 • E03 Why would railroad officials try to conceal these 49 deaths - Secrets of the Underground 00:08
Why would railroad officials try to conceal these 49 deaths
S01 • E08 Each step you're taking is shooting out hundreds of data points - Secrets of the Underground 00:07
Each step you're taking is shooting out hundreds of dat...
S01 • E07 Would probably be completely Charred and burnt. - Secrets of the Underground 00:04
Would probably be completely Charred and burnt.
S01 • E02 So, we have a State Capitol with state-of-the-art heating, - Secrets of the Underground 00:08
So, we have a State Capitol with state-of-the-art heating,
S01 • E08 If these secret Spanish tunnels do exist, - Secrets of the Underground 00:06
If these secret Spanish tunnels do exist,
S01 • E03 According to the company's recently unearthed secret files, - Secrets of the Underground 00:12
According to the company's recently unearthed secret fi...
S01 • E07 As I wind my way through This haunting landscape, - Secrets of the Underground 00:07
As I wind my way through This haunting landscape,