The Great Barrier Reef is one of the most famous and stunning natural wonders of the world. Located off the coast of Queensland, Australia, it stretches over 2,300 kilometers (1,430 miles) and is the largest coral reef system on Earth. The reef is home to a breathtaking diversity of marine life, including over 1,500 species of fish, 400 types of coral, and various species of sharks, rays, and sea turtles.