In the 16th century, settlers of Roanoke vanished without a trace. New evidence finally reveals what happened. Archaeologists investigate what destroyed the original Sin City, Sodom. A bold new theory suggests Stonehenge may be more than it seems.

A new investigation into the Shroud of Turin, a cloth said to have covered Jesus' body, reveals clues toward its authenticity. Modern tools are used to analyze photos of ghosts from the 1800's. The creator of the enigmatic Georgia Guidestones is revealed.