Rob Nelson delves into the secrets of Denver's hidden tunnels, tracing the mysterious operations of a clandestine group beneath the city's iconic landmarks.
Aired: Feb 14, 2017Rob Nelson delves into the alleged escape route of notorious gangster Al Capo...
2. Mystery of the Serpent Mound
Aired: Feb 21, 2017Rob Nelson delves into the secrets of Denver's hidden tunnels, tracing the my...
Aired: Feb 28, 2017The next episode delves into the unexplained mysteries of 57 Irish railroad w...
Aired: Mar 7, 2017Rob Nelson discovers cryptic symbols pointing to a primordial conflict and ve...
5. Great Lakes Bermuda Triangle
Aired: Mar 14, 2017Rob Nelson explores a Texas cave, uncovering clues to a mass extinction event...
6. California's Hidden Doomsday
Aired: Mar 21, 2017Rob Nelson delves into California's major fault lines, exposing the danger of...
7. Secret History of the New World
Aired: Mar 28, 2017A renowned archaeologist uncovers a groundbreaking finding in ancient New Eng...
Aired: Apr 4, 2017The next episode delves into the mysteries of Lake Michigan's depths, while a...
Seasons: 2
Network: Science
Production Country: United States
Genres:Documentary
