Townsville, in Australia's tropical north, is the third largest city in Queensland and the port for the agricultural and mining production of a vast inland area. The main attraction is the Great Barrier Reef, which offers some of the finest diving in the world and has many of its wonders displayed at the Great Barrier Reef Wonderland in Townsville. The Maritime Museum concentrates on the 1911 wreck of the Yongala, while the actual wreck can be visited by divers. A visit to the Magnetic Islands – so named by Captain Cook because they interfered with his magnetic compass – is highly recommended.