Intrepid divers are taking extreme activities to even more bloodcurdling heights. The Crocosaurus Cove, an aquarium and wildlife center in Darwin, Australia offers an attraction that's certainly not for the faint hearted. Visitors with nerves of steel are lowered into crocodile infested waters in the safety of an acrylic barrier called Cage of Death. The crocs are saltwater baddies native to Australia and renowned for their ferocity, they can grow more than 16ft long.