Great Barrier Reef

The globe's largest coral reef system – and one of the original Seven Natural Wonders of the World – touts incredible scenery, whether you view it underwater, from the air or by boat. At Australia's Great Barrier Reef, you'll find more than 600 islands and 1,500-plus species of fish. Though plenty of diving and snorkeling spots can be found along Queensland's coast, to escape the crowds, take an excursion to the Whitsunday Islands.ut