Called one of the best dive sites in the world. First explored by Jacques Cousteau, The Blue Hole has become a diver’s pilgrimage. At 412 feet deep and 1,000 feet wide, it has been said that the Blue Hole is like swimming down a mineshaft. Only this mineshaft is full of hammerhead sharks. Not for the faint of heart by any means, but if you’re a serious diver, the Blue Hole is a diving trip that should definitely be crossed off of your list.