Secrets Of The Underground
Using cutting-edge technology, scientists are now able to research ancient structures and bizarre geological occurrences that offer glimpses into history like never before.

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Season 1
  • {S}01.{E}01: American Stonehenge

    S01.E01: American Stonehenge

    Rob Nelson investigates the mysterious rocks at the bottom of Lake Michigan known as Underwater Stonehenge. Plus, the search for escape tunnels in Alcatraz.
    Duration: 44 Min
  • {S}01.{E}02: Mystery Of The Serpent Mound

    S01.E02: Mystery Of The Serpent Mound

    Rob Nelson investigates mysterious tunnels under Denver's airport. Plus, in Ohio he tries to uncover the secrets of a giant serpent-shaped mound.
    Duration: 44 Min
  • {S}01.{E}03: Capone's Escape Tunnels
    New episode

    S01.E03: Capone's Escape Tunnels

    Rob Nelson investigates rumours of secret underground escape route used by infamous gangster Al Capone. Plus, mysterious earthen mounds in Washington State.
    Duration: 44 Min