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But I have to wonder
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Secrets of the Underground

But I have to wonder, is this really juststandard airport protocol at work, or could that...

But I have to wonder, is this really just
standard airport protocol at work, or could that just be a convenient
cover to conceal something bigger, as some believe?

Full Transcript

00:00:01.000 --> 00:00:02.048
But I have to wonder,
00:00:02.056 --> 00:00:05.084
is this really just standard airport protocol at work,
00:00:05.092 --> 00:00:09.036
or could that just be a convenient cover to conceal something bigger,
00:00:09.044 --> 00:00:10.076
as some believe?
Duration
11 seconds
Views
20
Timestamp in Movie
00:03:25
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 In 1832, a contractor named Philip Duffy - Secrets of the Underground 00:07
In 1832, a contractor named Philip Duffy
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 • 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...
S01 • E08 After the Spanish-American War, the rising inmate population, - Secrets of the Underground 00:12
After the Spanish-American War, the rising inmate population...
S01 • E01 This is the same direction Al Capone would have made. - Secrets of the Underground 00:04
This is the same direction Al Capone would have made.
S01 • E02 Its final cost was almost two billion dollars over budget, - Secrets of the Underground 00:09
Its final cost was almost two billion dollars over budget,
S01 • E03 But within weeks of reaching their new home, - Secrets of the Underground 00:08
But within weeks of reaching their new home,
S01 • E01 And right over here is the opening to the tunnel. - Secrets of the Underground 00:04
And right over here is the opening to the tunnel.
S01 • E02 It has the longest commercial runway in the country, - Secrets of the Underground 00:09
It has the longest commercial runway in the country,
S01 • E03 Legend has it, their bodies were then dumped - Secrets of the Underground 00:06
Legend has it, their bodies were then dumped
S01 • E08 Wow. There wasn't a lot to like, but they did like the fact - Secrets of the Underground 00:07
Wow. There wasn't a lot to like, but they did like the ...