Join the conversation
Log in or create an account to leave a comment
Log In
There's actually a level below us
used for solitary confinement
used for solitary confinement
Full Transcript
00:00:01.000 --> 00:00:04.052
There's actually a level below us
used for solitary confinement.
Want This Clip in HD?
Upgrade for HD/4K downloads and unlimited access. Upgrade now →
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...