The Great Barrier Reef is located off the northeastern coast of Australia, extending from the northern part of Queensland. It is the world's largest coral reef system, comprising over 2,900 individual reefs and 900 islands, making it a UNESCO World Heritage site. The reef is renowned for its biodiversity, serving as a habitat for a wide array of marine life, including fish, corals, and sea turtles. Popular for activities such as snorkeling and scuba diving, the Great Barrier Reef is also facing threats from climate change and other environmental factors.