05. The Great Barrier Reef - Australia

The only living thing that can be seen from outer space that is larger than the Great Wall of China is the Great Barrier Reef, the largest coral reef system in the world. Located in Australia, this reef system is composed of 2,900 individual reefs and 900 islands making it 1,600 miles in length. The overall structure of the reef is composed of billions of tiny organisms, known as coral polyps. Along with the ocean, the reef creates a habitat that supports a great diversity of sea life, some of which are endangered. Because of the vast beauty of the Reef, people find it very appealing to visit thus bringing many tourist dollars to the area, which help to put in place protective measures to hopefully protect this valuable wonder for many generations to come.
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