A fleet of sunken ships points to ghosts, cannibals, and bloodshed in early America. Strange Arctic holes that NASA can't explain. Near Area 51, mysterious alien structures straight out of Star Wars. Cutting-edge technology helps experts investigate.

Hundreds of shipwrecks in the middle of a desert in Africa. A ghost town where hundreds of its inhabitants have mysteriously died. Something strange in North Korea. Cutting-edge tech helps experts answer these sinister mysteries from space.