Heart Reef, Great Barrier Reef, Queensland, Australiaの写真素材

The Great Barrier Reef is the worlds largest reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,600 kilometers (1,600 mi) over an area of approximately 344,400 square kilometers (133,000 sq mi). 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 and is the worlds biggest single structure made by living organisms.