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That might be a stretch
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Secrets of the Underground

That might be a stretch, but how about other sentient beings?

That might be a stretch, but how about other sentient beings?

Full Transcript

00:00:01.000 --> 00:00:02.068
That might be a stretch,
00:00:02.076 --> 00:00:05.096
but how about other sentient beings?
Duration
6 seconds
Views
16
Timestamp in Movie
00:24:35
Uploaded
Jul 12, 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 Then a friend texts me - Secrets of the Underground 00:11
Then a friend texts me
S01 • E01 When early explorers happened upon this spot in 1841, - Secrets of the Underground 00:14
When early explorers happened upon this spot in 1841,
S01 • E03 The reason? Multiple openings in the lake bed - Secrets of the Underground 00:07
The reason? Multiple openings in the lake bed
S01 • E07 My gosh. This is a structure. - Secrets of the Underground 00:05
My gosh. This is a structure.
S01 • E02 Namely, why is there a sealed-off tunnel - Secrets of the Underground 00:06
Namely, why is there a sealed-off tunnel
S01 • E08 The site that we're looking at is possibly a ceremonial site. - Secrets of the Underground 00:06
The site that we're looking at is possibly a ceremonial...
S01 • E03 But there are fundamental differences between Lost Lake and Mountain Lake. - Secrets of the Underground 00:05
But there are fundamental differences between Lost Lake and ...
S01 • E07 That's what we saw right there. That was the window. - Secrets of the Underground 00:05
That's what we saw right there. That was the window.
S01 • E02 As it turns out, - Secrets of the Underground 00:08
As it turns out,
S01 • E03 Lost Lake goes through the same cycle every year. - Secrets of the Underground 00:04
Lost Lake goes through the same cycle every year.
S01 • E07 As I explore This bizarre structure, - Secrets of the Underground 00:06
As I explore This bizarre structure,
S01 • E08 Mark and Hank suspect this rock formation may not only be man-made, - Secrets of the Underground 00:09
Mark and Hank suspect this rock formation may not only be ma...
S01 • E01 When the adventurers dug into them, though, - Secrets of the Underground 00:05
When the adventurers dug into them, though,
S01 • E03 The plug holes are lava tubes thousands of years old - Secrets of the Underground 00:07
The plug holes are lava tubes thousands of years old
S01 • E02 This was built in 1889 by a madam named Jennie Rogers. - Secrets of the Underground 00:05
This was built in 1889 by a madam named Jennie Rogers.
S01 • E01 So the mounds don't appear to be graves. - Secrets of the Underground 00:04
So the mounds don't appear to be graves.
S01 • E07 And it's not long before I Uncover an even stranger detail. - Secrets of the Underground 00:06
And it's not long before I Uncover an even stranger det...
S01 • E03 In winter, there's enough rain and snowfall to balance - Secrets of the Underground 00:06
In winter, there's enough rain and snowfall to balance
S01 • E02 And if you look up here at the top, - Secrets of the Underground 00:05
And if you look up here at the top,
S01 • E02 At the very, very top, - Secrets of the Underground 00:05
At the very, very top,