Australia

The Great Barrier Reef is the world's largest reef system[1][2] composed of over 2,900 individual reefs[3] and 900 islands stretching for over 2,600 kilometres (1,600 mi) over an area of approximately 344,400 square kilometres (133,000 sq mi).[4][5] The reef is located in the Coral Sea, off the coast of Queensland in north-east Australia. The Great Barrier Reef can be seen from outer space...

The Blue Mountains is a mountainous region in New South Wales, Australia. It borders on Sydney's metropolitan area, its foothills starting approximately 50 kilometres west of the state capital.[1] The area begins on the west side of the Nepean River and extends westward as far as Coxs River[2]. Consisting mainly of a sandstone plateau, the area is dissected by gorges up to 760 metres deep....