The Great Barrier Reef is located in Australia. It is the world's largest coral reef system, stretching over 2,300 kilometers along the Queensland coast in the Coral Sea. This natural wonder is composed of over 2,900 individual reefs and 900 islands, making it a UNESCO World Heritage site. The reef is renowned for its rich biodiversity, serving as a habitat for various marine species, including fish, corals, turtles, and even dolphins and sharks. It attracts millions of tourists each year for activities such as snorkeling, diving, and sightseeing, making it vital for Australia's tourism industry.