World Heritage-listed Fraser Island, between Bundaberg and Brisbane off Australia's east coast, is the largest sand island in the world and one of Australia's most unique four-wheel-drive adventures. Sharks, dolphins, and whales prowl the waters and the island's fauna includes wild horses, dingoes, bats, sugar gliders, and more than 300 species of birds.Access to Fraser Island is by ferry from Rainbow Beach and Hervey Bay. Four-wheel drive vehicles are essential as the island has no sealed roads.