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So, this clearly isn't the first time Heath has heard these questions
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Secrets of the Underground

So, this clearly isn't the first timeHeath has heard these questions

So, this clearly isn't the first time
Heath has heard these questions

Full Transcript

00:00:01.000 --> 00:00:05.008
So, this clearly isn't the first time Heath has heard these questions.
Duration
5 seconds
Views
20
Timestamp in Movie
00:03:13
Uploaded
Jul 12, 2025
Season
1
Episode
2
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 • E03 What we know here is that a total of 57 Irish railroad workers - Secrets of the Underground 00:10
What we know here is that a total of 57 Irish railroad worke...
S01 • E01 In the Prohibition era of the 1920s, - Secrets of the Underground 00:07
In the Prohibition era of the 1920s,
S01 • E08 My first stop is the main cellblock, - Secrets of the Underground 00:06
My first stop is the main cellblock,
S01 • E02 After all, strict access procedures are now in place - Secrets of the Underground 00:07
After all, strict access procedures are now in place
S01 • E01 After picking up a new supply of bourbon and moonshine, - Secrets of the Underground 00:08
After picking up a new supply of bourbon and moonshine,
S01 • E08 Meeting me there is Alcatraz historian John Martini. - Secrets of the Underground 00:05
Meeting me there is Alcatraz historian John Martini.
S01 • E03 And we're at the site of the most difficult mile in that entire system. - Secrets of the Underground 00:04
And we're at the site of the most difficult mile in tha...
S01 • E02 But I have to wonder, - Secrets of the Underground 00:11
But I have to wonder,
S01 • E01 From here, cash and contraband were allegedly funnelled underground, - Secrets of the Underground 00:08
From here, cash and contraband were allegedly funnelled unde...
S01 • E03 In 1832, a contractor named Philip Duffy - Secrets of the Underground 00:07
In 1832, a contractor named Philip Duffy
S01 • E01 This is the legend. But did it really happen? - Secrets of the Underground 00:04
This is the legend. But did it really happen?
S01 • E02 In my research, I discovered some odd facts about Denver International. - Secrets of the Underground 00:06
In my research, I discovered some odd facts about Denver Int...
S01 • E03 The area's hilly terrain made it one of the railroad's toughest stretches. - Secrets of the Underground 00:05
The area's hilly terrain made it one of the railroad�...
S01 • E08 Since the mid-19th century, Alcatraz has been synonymous with outlaws. - Secrets of the Underground 00:05
Since the mid-19th century, Alcatraz has been synonymous wit...
S01 • E02 Facts that have fuelled rumours - Secrets of the Underground 00:06
Facts that have fuelled rumours
S01 • E03 To build what came to be known as Duffy's Cut, - Secrets of the Underground 00:06
To build what came to be known as Duffy's Cut,
S01 • E08 During the Civil War, Confederate sympathisers - Secrets of the Underground 00:06
During the Civil War, Confederate sympathisers
S01 • E02 Despite being only the sixth-busiest airport in the US, - Secrets of the Underground 00:11
Despite being only the sixth-busiest airport in the US,
S01 • E01 So I journey with hotel representative Jim Meyer - Secrets of the Underground 00:09
So I journey with hotel representative Jim Meyer
S01 • E03 They were among the tens of thousands of Irish immigrants who arrived that year, - Secrets of the Underground 00:08
They were among the tens of thousands of Irish immigrants wh...