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Mark even makes us surrender our cellphones at the dock
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Secrets of the Underground

Mark even makes us surrenderour cellphones at the dock so we can't use GPSto pinpoint our...

Mark even makes us surrender
our cellphones at the dock so we can't use GPS
to pinpoint our location

Full Transcript

00:00:01.000 --> 00:00:03.088
Mark even makes us surrender our cellphones at the dock
00:00:03.096 --> 00:00:07.076
so we can't use GPS to pinpoint our location.
Duration
8 seconds
Views
20
Timestamp in Movie
00:25:19
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 • E01 Like the Cahokia mounds in Illinois, - Secrets of the Underground 00:24
Like the Cahokia mounds in Illinois,
S01 • E02 Yes, actually, this was the premier brothel. - Secrets of the Underground 00:04
Yes, actually, this was the premier brothel.
S01 • E02 This entire street was known as Holliday Street originally - Secrets of the Underground 00:11
This entire street was known as Holliday Street originally
S01 • E08 These are some pretty serious measures to protect a few submerged stones. - Secrets of the Underground 00:05
These are some pretty serious measures to protect a few subm...
S01 • E03 At 3,800 feet above sea level, - Secrets of the Underground 00:07
At 3,800 feet above sea level,
S01 • E07 For any real purpose, - Secrets of the Underground 00:06
For any real purpose,
S01 • E08 So, I can't help but wonder, - Secrets of the Underground 00:05
So, I can't help but wonder,
S01 • E03 Most lakes in this region are much closer to sea level. - Secrets of the Underground 00:05
Most lakes in this region are much closer to sea level.
S01 • E02 It turns out that the first floor of the brothel was a restaurant - Secrets of the Underground 00:08
It turns out that the first floor of the brothel was a resta...
S01 • E08 But before I find out, it's time to cut the cameras. - Secrets of the Underground 00:04
But before I find out, it's time to cut the cameras.
S01 • E07 What was this Structure used for, - Secrets of the Underground 00:07
What was this Structure used for,
S01 • E03 So, the fact that this lake even exists here at all - Secrets of the Underground 00:06
So, the fact that this lake even exists here at all
S01 • E03 But the locals whose livelihoods have depended on it for decades - Secrets of the Underground 00:06
But the locals whose livelihoods have depended on it for dec...
S01 • E01 So could there be some other ceremonial or practical purpose - Secrets of the Underground 00:09
So could there be some other ceremonial or practical purpose
S01 • E02 The place did a brisk business, - Secrets of the Underground 00:08
The place did a brisk business,
S01 • E03 That's why when the water disappeared, - Secrets of the Underground 00:10
That's why when the water disappeared,
S01 • E08 I'm on a quest to investigate a mysterious pattern of rocks - Secrets of the Underground 00:10
I'm on a quest to investigate a mysterious pattern of r...
S01 • E02 So, Tracy believes they entered through more innocuous saloons - Secrets of the Underground 00:14
So, Tracy believes they entered through more innocuous saloo...
S01 • E01 Archaeological evidence suggests - Secrets of the Underground 00:07
Archaeological evidence suggests
S01 • E07 Couldn't be, say, A native-american structure? - Secrets of the Underground 00:04
Couldn't be, say, A native-american structure?