Gadget explores Australia, from the Great Barrier Reef to some of the world's largest pearls. He explores two mysterious ships, whichl lie shipwrecked at the bottom of the sea, and gets up-close and personal with some of the largest reptiles on earth at the Crocodylus Park Crocodile Research Center. // Gadget learns about animals at the Florida Keys' Underwater World, Dolphins Plus, Scott Carpenter's Man in the Sea Program, the Jules Undersea Lodge, and the Mel Fisher Maritime Heritage Center.