<human>:  What is the Great Barrier Reef?
<bot>: The Great Barrier Reef is the world's largest coral reef system, located off the coast of Queensland, Australia. It stretches for over 2,300 kilometers and is composed of 2,900 individual reefs and 900 islands. It is also the world's biggest single structure made by living organisms. It is home to a diverse range of marine life, including fish, coral, dugongs, turtles, and more. The reef is a popular tourist destination and is part of the Great Barrier Reef Marine Park, which is dedicated to protecting the reef and its inhabitants.