Josh hunts history's greatest treasure, the tomb of Alexander the Great.

The search for Alexander's remains and fortune extends to four countries.

In Bucks County, Pennsylvania, Josh hunts riches stolen by British loyalists, the Doan Gang, during the American Revolution.

Just off Florida's coast, Josh Gates braves shark-infested waters in search of an American ship sunk by a Nazi U-boat during WWII. Josh joins Tristan Guttridge who has a bold new strategy to use sharks as spies to uncover the wreck.

Josh searches for wreckage of a bomber that helped defeat the Nazis.

Josh dives the waters off Tanzania to find a lost city and its riches.

Josh dives the Ivory Coast in search of 18 US servicewomen lost in WWII.