A rotting hull of a ship...lost gold...coins...gems... Sunken Treasure! Today treasure hunting is a big business. Searchers use metal detectors and sonar to locate treasure on the ocean floor. Divers use high-powered machinery to uncover objects buried in the sand and to raise them to the surface. And more than just treasures are discovered. A whole window into the past is opened up. A salvage can take months or even years. But it's worth it!