The Great Barrier Reef is located in Australia. This UNESCO World Heritage site, the largest coral reef system in the world, stretches over 2,300 kilometers along Queensland's coast. Comprising thousands of individual reefs and islands, the reef supports an incredibly diverse ecosystem, including numerous marine species such as fish, mollusks, and sea turtles. The Great Barrier Reef is not only a popular destination for tourists and divers but also plays a vital role in marine research and conservation efforts. However, it faces significant threats from climate change, pollution, and coastal development, necessitating ongoing conservation initiatives.