Secrets of the Underground

Secrets of the Underground

American Stonehenge (1x8)

Seizoensfinale

Uitzenddatum: Apr 04, 2017

Rob 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.

  • in première gegaan: Feb 2017
  • Afleveringen: 16
  • Volgers: 7
  • Afgelopen
  • Science Channel
  • Dinsdag