Regarded as one of the greatest wreck dives in the world, the 110-meter S.S. Yongala once lay undiscovered on the ocean floor for over half a century after its untimely demise in 1911. Situated between the towns of Townsville and Ayr off the coast of Queensland, Australia, the S.S. Yongala is one of the largest and most intact historic shipwrecks that can be explored under the sea. Being the only reef formation in the region, the ship attracts and hosts a higher density of marine life than you might believe possible.