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The first step to solving this mystery
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Secrets of the Underground

The first step tosolving this mystery is to check if the clay plugsinstalled in 2013 held,...

The first step to
solving this mystery is to check if the clay plugs
installed in 2013 held, or if water is still
draining through them

Full Transcript

00:00:01.000 --> 00:00:02.088
The first step to solving this mystery
00:00:02.096 --> 00:00:06.064
is to check if the clay plugs installed in 2013 held,
00:00:06.072 --> 00:00:09.076
or if water is still draining through them.
Duration
10 seconds
Views
15
Timestamp in Movie
00:26:54
Uploaded
Jul 09, 2025
Season
1
Episode
3
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's a psychological phenomenon, pareidolia. - Secrets of the Underground 00:05
It's a psychological phenomenon, pareidolia.
S01 • E08 Once we're out in open water, - Secrets of the Underground 00:07
Once we're out in open water,
S01 • E02 An area believed to be big enough to house 32 city blocks - Secrets of the Underground 00:07
An area believed to be big enough to house 32 city blocks
S01 • E01 Our brains are wired to detect human faces from birth, - Secrets of the Underground 00:08
Our brains are wired to detect human faces from birth,
S01 • E07 If vance's theory is true, - Secrets of the Underground 00:05
If vance's theory is true,
S01 • E08 So I join underwater archaeologist Mark Holley on the top deck - Secrets of the Underground 00:08
So I join underwater archaeologist Mark Holley on the top de...
S01 • E02 Is all that space really just for baggage handlers? - Secrets of the Underground 00:04
Is all that space really just for baggage handlers?
S01 • E03 Once the ROV settles, - Secrets of the Underground 00:06
Once the ROV settles,
S01 • E01 Because of that, we sometimes see faces or distinct shapes - Secrets of the Underground 00:13
Because of that, we sometimes see faces or distinct shapes
S01 • E02 But if it is part of some large classified site, - Secrets of the Underground 00:08
But if it is part of some large classified site,
S01 • E03 But if Paki stirs up silt with the thrusters and there is a leak, - Secrets of the Underground 00:09
But if Paki stirs up silt with the thrusters and there is a ...
S01 • E07 Likely reached these shores long Before the spaniard set sail. - Secrets of the Underground 00:05
Likely reached these shores long Before the spaniard set sai...
S01 • E08 We were looking for a shipwreck, - Secrets of the Underground 00:05
We were looking for a shipwreck,
S01 • E07 One author believes that A celebrated chinese mariner. - Secrets of the Underground 00:04
One author believes that A celebrated chinese mariner.
S01 • E08 We had no idea what it was, - Secrets of the Underground 00:06
We had no idea what it was,
S01 • E02 Now my quest to unlock America's underground secrets - Secrets of the Underground 00:12
Now my quest to unlock America's underground secrets
S01 • E01 In fact, the longer I look at the drone footage, - Secrets of the Underground 00:08
In fact, the longer I look at the drone footage,
S01 • E07 And landed on the west coast In the early 15th century, - Secrets of the Underground 00:07
And landed on the west coast In the early 15th century,
S01 • E07 And in newfoundland, canada, - Secrets of the Underground 00:04
And in newfoundland, canada,
S01 • E08 One look at the outline of the rocks was all it took to convince - Secrets of the Underground 00:08
One look at the outline of the rocks was all it took to conv...