The Great Barrier Reef is located off the coast of Queensland, Australia. It is the world's largest coral reef system, experiencing a vast array of marine biodiversity. Spanning over 2,300 kilometers, the reef comprises thousands of individual reefs and islands. It is home to countless species, including various fish, corals, mollusks, and marine mammals. The Great Barrier Reef is a UNESCO World Heritage site and is recognized for its ecological significance as well as its stunning beauty. It is a popular destination for tourists, divers, and researchers alike, though it faces significant threats from climate change and human activity.