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Secrets of the Underground

The question is, could there have been more tothese rumours than wishful thinking?

The question is, could there have been more to
these rumours than wishful thinking?

Full Transcript

00:00:01.000 --> 00:00:02.024
The question is,
00:00:02.032 --> 00:00:05.006
could there have been more to these rumours than wishful thinking?
Duration
6 seconds
Views
11
Timestamp in Movie
00:08:54
Uploaded
Jul 09, 2025
Season
1
Episode
8
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 That are associated With volcanic activity. - Secrets of the Underground 00:04
That are associated With volcanic activity.
S01 • E03 To investigate, I'll send an ROV - Secrets of the Underground 00:08
To investigate, I'll send an ROV
S01 • E08 Stefan and I are gonna take some of this high-tech equipment - Secrets of the Underground 00:08
Stefan and I are gonna take some of this high-tech equipment
S01 • E02 With the eyes of airport security now watching my every move, - Secrets of the Underground 00:07
With the eyes of airport security now watching my every move...
S01 • E01 This is a very very thin wall, only about 2" thick. - Secrets of the Underground 00:04
This is a very very thin wall, only about 2" thick.
S01 • E07 For the million-plus residents Of sacramento, fresno, and reno? - Secrets of the Underground 00:07
For the million-plus residents Of sacramento, fresno, and re...
S01 • E08 The prison recreation yard is where subterranean air gaps - Secrets of the Underground 00:08
The prison recreation yard is where subterranean air gaps
S01 • E01 If, in theory, we could get through this wall, - Secrets of the Underground 00:06
If, in theory, we could get through this wall,
S01 • E02 But the airport isn't the only spot in Denver - Secrets of the Underground 00:07
But the airport isn't the only spot in Denver
S01 • E07 When magma moves up From the earth's core, - Secrets of the Underground 00:09
When magma moves up From the earth's core,
S01 • E08 If inmates burrowed underneath it, their trail would have started here. - Secrets of the Underground 00:05
If inmates burrowed underneath it, their trail would have st...
S01 • E01 GPR confirms it. There's empty space behind these two portals. - Secrets of the Underground 00:05
GPR confirms it. There's empty space behind these two p...
S01 • E02 There are rumours of a labyrinth leading to and from - Secrets of the Underground 00:07
There are rumours of a labyrinth leading to and from
S01 • E01 That means that if Capone escaped through these sewer tunnels, - Secrets of the Underground 00:09
That means that if Capone escaped through these sewer tunnel...
S01 • E07 In fact, that build-up Of pressure in the helium. - Secrets of the Underground 00:04
In fact, that build-up Of pressure in the helium.
S01 • E03 I'm exploring a stretch of woods known as Duffy's Cut, - Secrets of the Underground 00:09
I'm exploring a stretch of woods known as Duffy's ...
S01 • E02 Could these also be connected to the theories surrounding the airport? - Secrets of the Underground 00:05
Could these also be connected to the theories surrounding th...
S01 • E08 The rec yard is back that way - Secrets of the Underground 00:07
The rec yard is back that way
S01 • E01 So all he had to do was walk down from the lobby, like I did, - Secrets of the Underground 00:07
So all he had to do was walk down from the lobby, like I did...
S01 • E07 I think we can say, Without much doubt, - Secrets of the Underground 00:05
I think we can say, Without much doubt,