play_circle
Secrets of the Undergroundchevron_right
S01E08: American StonehengeRob Nelson investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Underwater Stonehenge. At the notorious Alcatraz prison, Rob uses state-of-the-art technology in search of rumored escape tunnels.
Genres:
Air Date:
Apr 04, 2017
Runtime:
60 minutes
Casts:
