E6 • California's Hidden Doomsday

E1 • Capone's Escape Tunnels

A secret, underground escape tunnel used by Al Capone is investigated.

44m •

A secret, underground escape tunnel used by Al Capone is investigated.

E2 • Mystery Of The Serpent Mound

Rumors of a secret organization operating beneath Denver are investigated.

44m •

Rumors of a secret organization operating beneath Denver are investigated.

E3 • America's Buried Massacre

Rob Nelson hunts for a legendary mass grave in Pennsylvania.

44m •

Rob Nelson hunts for a legendary mass grave in Pennsylvania.

E4 • Rocky Mountain Monsters

Rob Nelson examines a set of bizarre markings on a Colorado ridge.

44m •

Rob Nelson examines a set of bizarre markings on a Colorado ridge.

E5 • Great Lakes Bermuda Triangle

A phenomenon causing ships to disappear in Lake Michigan is explored.

44m •

A phenomenon causing ships to disappear in Lake Michigan is explored.

E6 • California's Hidden Doomsday

Fault lines that could trigger a massive earthquake are investigated.

44m •

Fault lines that could trigger a massive earthquake are investigated.

E7 • Secret History Of The New World

Strange ruins are examined that may have been built by ancient Europeans.

44m •

Strange ruins are examined that may have been built by ancient Europeans.

E8 • American Stonehenge

Rob Nelson searches for rumored escape tunnels deep beneath Alcatraz.

44m •

Rob Nelson searches for rumored escape tunnels deep beneath Alcatraz.