Located in the Coral Sea, just off the eastern coast of Australia, the Great Barrier Reef is the largest system of coral reefs in the world and a colorful ecosystem home to a variety of marine life, including sea turtles, fish, sharks, stingrays, and corals. A UNESCO World Heritage Site and one of the seven wonders of the natural world, the Great Barrier Reef is one of Australia's most famous landmarks and a treasure trove of biodiversity and natural beauty.