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Their excavations have also turned up artefacts
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Secrets of the Underground

Their excavationshave also turned up artefacts that likely belongedto the labourers

Their excavations
have also turned up artefacts that likely belonged
to the labourers

Full Transcript

00:00:01.000 --> 00:00:03.084
Their excavations have also turned up artefacts
00:00:03.092 --> 00:00:06.004
that likely belonged to the labourers.
Duration
6 seconds
Views
16
Timestamp in Movie
00:06:01
Uploaded
Jul 13, 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 And then there's a second tunnel on this side. - Secrets of the Underground 00:04
And then there's a second tunnel on this side.
S01 • E03 We've got examples of Irish pipes. Wow, look at that. These are fantastic. - Secrets of the Underground 00:06
We've got examples of Irish pipes. Wow, look at that. T...
S01 • E07 In 2016 at Yellowstone national park, - Secrets of the Underground 00:08
In 2016 at Yellowstone national park,
S01 • E02 Some suspect the airport tunnels lead to a secret bunker complex - Secrets of the Underground 00:08
Some suspect the airport tunnels lead to a secret bunker com...
S01 • E08 And he shimmied himself down along that - Secrets of the Underground 00:12
And he shimmied himself down along that
S01 • E01 This is awesome. Looks like a great place to escape, as a gangster. - Secrets of the Underground 00:05
This is awesome. Looks like a great place to escape, as a ga...
S01 • E03 This is clay and it says "Flag of Ireland". - Secrets of the Underground 00:04
This is clay and it says "Flag of Ireland".
S01 • E03 So, was this a very common style at the time, - Secrets of the Underground 00:06
So, was this a very common style at the time,
S01 • E02 I'm finding it all a little hard to believe... - Secrets of the Underground 00:04
I'm finding it all a little hard to believe...
S01 • E07 When authorities came To retrieve the body, - Secrets of the Underground 00:05
When authorities came To retrieve the body,
S01 • E08 And he decided in his head that if he broke through the bricks, - Secrets of the Underground 00:06
And he decided in his head that if he broke through the bric...
S01 • E02 (MAN SPEAKING) - Secrets of the Underground 00:08
(MAN SPEAKING)
S01 • E01 (LAUGHS) - Secrets of the Underground 00:08
(LAUGHS)
S01 • E03 And one... another one with the shamrock and the harp... - Secrets of the Underground 00:05
And one... another one with the shamrock and the harp...
S01 • E07 Bubbling up From the earth's core. - Secrets of the Underground 00:05
Bubbling up From the earth's core.
S01 • E08 Several hours down there, a few minutes at a time, - Secrets of the Underground 00:06
Several hours down there, a few minutes at a time,
S01 • E01 So they could have connected to a citywide sewer system - Secrets of the Underground 00:08
So they could have connected to a citywide sewer system
S01 • E03 The find reignited the long-forgotten mystery - Secrets of the Underground 00:10
The find reignited the long-forgotten mystery
S01 • E07 Is an active magma chamber Miles below the earth's surface. - Secrets of the Underground 00:05
Is an active magma chamber Miles below the earth's surf...
S01 • E07 But while yellowstone's Hot springs are dangerous, - Secrets of the Underground 00:06
But while yellowstone's Hot springs are dangerous,