1. The Great Barrier Reef, Australia The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres over an area of approximately 344,400 square kilometres. The reef is located in the Coral Sea, off the coast of Queensland, Australia. The reef is located off the coast of Queensland, Australia , in the Coral Sea. The reef , which is large enough to be visible from space, is made up of nearly 3,000 individual reefs . Much of the Great Barrier Reef is a marine protected area, managed by the Great Barrier Reef Marine Park Authority of Australia 2. Whitehaven Beach , whitesunday , Australia Whitehaven Beach is a 7 km stretch along Whitsunday Island, Australia. The island is accessible by boat, seaplane & helicopter from Airlie Beach, as well as Hamilton Island. It lies across from Stockyard Beach, better known as Chal...