1 THE YONGALA, AUSTRALIA Claimed by many as the best wreck in the world to dive due to the amount of life it supports. It is encrusted in corals and masses of marine life that have made its home including sea snakes, manta rays, tiger sharks, octopus, turtles, bull sharks and thousands of clown fish. At 109m long and at a depth of 16-30m, she is suitable for most divers with an Advanced Certification or higher.