![](https://m.media-amazon.com/images/S/pv-target-images/783fb418c1a03d36766bc9e67dedbc0a49f744657aeb94c2a77366dcad84892f._SX1080_FMjpg_.jpg)
Free trial of discovery+ or buy
Episodes
- S1 E1 - Capone's Escape TunnelsFebruary 13, 201742minRob Nelson investigates rumors of a secret, underground escape route used by the infamous gangster Al Capone in Louisville, KY. Also, the Mima mounds in Washington State are explored.Free trial of discovery+ or buy
- S1 E2 - Mystery of the Serpent MoundFebruary 20, 201742minRob Nelson explores mysterious tunnels beneath Denver's airport, capitol building, and downtown to investigate rumors of a secret organization. Also, the ancient secrets of a giant mound shaped like a serpent are investigated.Free trial of discovery+ or buy
- S1 E3 - America's Buried MassacreFebruary 27, 201742minRob Nelson hunts for a legendary mass grave that could expose a dark secret from America's industrial past. Also, cutting edge technology is used to find out why a giant lake in Virginia suddenly vanished.Free trial of discovery+ or buy
- S1 E4 - Rocky Mountain MonstersMarch 6, 201742minRob Nelson examines a set of bizarre markings on a Colorado ridge that suggest a violent clash between prehistoric beasts. Also, an ancient California lake is investigated to see if it's home to alien life.Free trial of discovery+ or buy
- S1 E5 - Great Lakes Bermuda TriangleMarch 13, 201742minRob Nelson descends into a Texas cave to uncover ancient remains of an unknown, mass extinction. Also, a phenomenon that's caused ships to disappear for centuries in the placid waters of Lake Michigan is investigated.Free trial of discovery+ or buy
- S1 E6 - California's Hidden DoomsdayMarch 20, 201742minRob Nelson heads to California to investigate a network of major fault lines that could set off a massive earthquake. Also, a mysterious sinkhole is explored that some believe is a portal to the center of the Earth.Free trial of discovery+ or buy
- S1 E7 - Secret History of the New WorldMarch 27, 201742minRob Nelson investigates a cluster of ancient ruins that suggest Europeans arrived in North America almost 1,000 years before Columbus. Also, a dormant supervolcano may be showing new signs of life.Free trial of discovery+ or buy
- S1 E8 - American StonehengeApril 3, 201742minRob Nelson uses state-of-the-art technology to search for rumored escape tunnels deep beneath Alcatraz. Also, a mysterious pattern of rocks is investigated at the bottom of Lake Michigan.Free trial of discovery+ or buy
Details
More info
- Audio languages
- English
- Subtitles
- English [CC]
- Studio
- Science
By clicking play, you agree to our Terms of Use.