Great Barrier Reef and Whitehaven beach, Australia
Diverse aquatic species include leatherback turtles and clown fish, the Great Barrier Reef needs no introduction. 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 (133,000 sq mi), the Great Barrier Reef can be seen from outer space and is the world's biggest single structure made by living organisms
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