Like much of eastern Australia, the Great Dividing Range runs roughly parallel with, and inland from, the coast, and areas west of the range are more arid than the humid coastal regions. The Great Barrier Reef, which is the world's largest coral reef system, runs parallel to the state's Coral Sea coast between the Torres Strait and Fraser Island. Queensland's coastline includes the world's three largest sand islands: Fraser, Moreton and North Stradbroke.