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And what is this? Is this a sewer system, or...?
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Secrets of the Underground

And what is this?Is this a sewer system, or...?

And what is this?
Is this a sewer system, or...?

Full Transcript

00:00:01.000 --> 00:00:04.032
And what is this? Is this a sewer system, or...?
Duration
4 seconds
Views
12
Timestamp in Movie
00:04:22
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 • E02 That's enough to cover 32 city blocks a quarter-mile deep. - Secrets of the Underground 00:05
That's enough to cover 32 city blocks a quarter-mile de...
S01 • E01 Well, at one time this tunnel stretched much further. - Secrets of the Underground 00:05
Well, at one time this tunnel stretched much further.
S01 • E03 Probably about 25 cents a day at most, - Secrets of the Underground 00:10
Probably about 25 cents a day at most,
S01 • E08 Wow. These rooms are so tiny. - Secrets of the Underground 00:05
Wow. These rooms are so tiny.
S01 • E02 And it seems like far more than would be needed - Secrets of the Underground 00:07
And it seems like far more than would be needed
S01 • E01 Over the years, they have built walls and concrete - Secrets of the Underground 00:10
Over the years, they have built walls and concrete
S01 • E08 One bed, a place to wash your hands, a place to use the toilet. - Secrets of the Underground 00:05
One bed, a place to wash your hands, a place to use the toil...
S01 • E02 So where did all this dirt come from and what's there now? - Secrets of the Underground 00:04
So where did all this dirt come from and what's there n...
S01 • E08 If I was in a room like this - Secrets of the Underground 00:09
If I was in a room like this
S01 • E03 Yet strangely, even though the confidential company files reveal - Secrets of the Underground 00:13
Yet strangely, even though the confidential company files re...
S01 • E02 I decide to investigate on my own - Secrets of the Underground 00:07
I decide to investigate on my own
S01 • E01 Oh! This is cool. - Secrets of the Underground 00:05
Oh! This is cool.
S01 • E08 One of the most notorious breakout attempts was in May 1946, - Secrets of the Underground 00:10
One of the most notorious breakout attempts was in May 1946,
S01 • E02 And right away, I'm struck by the peculiar symbols - Secrets of the Underground 00:06
And right away, I'm struck by the peculiar symbols
S01 • E01 It looks to me like this was a much bigger cave, - Secrets of the Underground 00:10
It looks to me like this was a much bigger cave,
S01 • E02 There's, like, a whole bunch of things here at the airport that are really odd. - Secrets of the Underground 00:05
There's, like, a whole bunch of things here at the airp...
S01 • E03 If disease was to blame, why were so many of the deaths kept secret? - Secrets of the Underground 00:05
If disease was to blame, why were so many of the deaths kept...
S01 • E08 It was dubbed "the Battle of Alcatraz". - Secrets of the Underground 00:04
It was dubbed "the Battle of Alcatraz".
S01 • E02 Exhibit A, a series of giant murals - Secrets of the Underground 00:08
Exhibit A, a series of giant murals
S01 • E03 So, this particular document points to 57 people dying here, - Secrets of the Underground 00:08
So, this particular document points to 57 people dying here,