The Great Barrier Reef can be found in Australia. It is the world's largest coral reef system, stretching over 2,300 kilometers (1,430 miles) along Australia's northeastern coast. Comprising roughly 2,900 individual reefs and 900 islands, the reef is home to a diverse array of marine life, including thousands of species of fish, coral, and other organisms. The Great Barrier Reef is a UNESCO World Heritage Site and plays a crucial role in marine biodiversity, tourism, and the economy of the region. Its preservation is vital due to threats such as climate change and pollution.