PHOTO CREDIT: MarEx Australia's first submarine, HMAS AE1, disappeared off the coast of Papua New Guinea in 1914. Now it has finally been found, solving a century-old maritime mystery. Source: CNN The 800-ton Royal Australian Navy submarine was lost off Rabaul on September 14, 1914 with all 35 crew on board. It was the first loss for the Royal Australian Navy and the first Allied submarine loss in World War I. PHOTO CREDIT: MarEx #Submarine #Wreck

Divers share their most mesmerising shots of the lost ships and aircraft that rest on the ocean floor PHOTO: BBC #BBC #wreck

Remote-controlled cameras offer a first-time glimpse of numerous wrecks entombed in the icy depths off the coast of Bulgaria. PHOTO: NatGeo #Blacksea #Wreck