The world's largest coral reef system, The Great Barrier Reef, is made of over 2,900 individual reefs and islands. It is located off the coast of Queensland. The reef is 2,600 km long and 344,400 square kilometers in area. An UNESCO World Heritage Site, it can be seen from outer space. The reef is built by tiny organisms known as coral polyps. A large part of the reef is protected by a marine park, which limits fishing and tourism. 1 billion a year is generated by tourism in the Whitsunday and Cairns regions. Website: http://greatbarrierreef.org/
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