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The Great Barrier Reef is one of the seven wonders of the natural world. It is larger than the Great Wall of China and the only living thing on earth visible from space. It is the largest living structure on the planet, a World Heritage Area, and home to one of the most complex natural ecosystems in the world. It’s known for its colorful reefs and variety of plants and animals. Swim, snorkel and dive in the world’s largest coral reef and admire the colorful coral cays.