9The Great Barrier Reef, Australia

The Great Barrier Reef, located off the coast of Queensland, Australia, is the largest coral reef system in the world. Stretching over 2,300 kilometers, it comprises nearly 3,000 individual reefs and 900 islands.

This UNESCO World Heritage site is renowned for its breathtaking beauty and ecological significance. Divers and snorkelers can encounter a diverse array of marine life, including over 1,500 species of fish, sea turtles, sharks, and vibrant coral formations. Iconic spots such as the Whitsunday Islands and the Outer Reef offer some of the most spectacular underwater experiences, showcasing the reef’s rich colors and abundant marine life.