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An odd structure that could be the lost tomb of Genghis Khan; mysterious dead patches in the desert that science can't explain; eerie sights in one of the world's oldest and strangest lakes.
Satellites locate strange spiral markings in the remote African desert; a fleet of massive ships stranded in a desert of drying Aral Sea; large arrows in the badlands of the American west.
Mysterious sightings in the Bermuda Triangle that could solve an age-old legend; a huge tsunami is heading straight for Hong Kong, then suddenly disappears.