Located off the coast of Queensland in northeast Australia, the Great Barrier Reef is the largest living structure on the planet and contains myriad natural wonders of its own. No surprise then, that it earns the top spot in this ranking.

It is composed of more than 2,900 individual reefs and covers an incredible 135,000 square miles. Its waters contain around 10% of the world's total fish species and it has 30 species of whales, dolphins, and porpoises.

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Marvel at the earliest photos of Australia

41 of Australia's most beautiful natural wonders