Science Ch. - Secrets of the Underground Series 1 (2017) Part 8 American Stonehenge
Secrets of the Underground Series 1
Rob Nelson, an ecologist by trade and an explorer by pastime, travels the country to investigate long-lost, subterranean phenomena
Part 8 American Stonehenge
Investigating 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 rumoured escape tunnels.
Full Version Available Upon Request