Great Barrier Reef

Great Barrier Reef
Coral reef in Queensland, Australia

The Great Barrier Reef, off the coast of Queensland in northeastern Australia, is the largest living thing on Earth, and even visible from outer space. The 2,300km-long ecosystem comprises thousands of reefs and hundreds of islands made of over 600 types of hard and soft coral. It’s home to countless species of colorful fish, molluscs and starfish, plus turtles, dolphins and sharks.
Area: 344,400 km²
UNESCO World Heritage Site inscription: 1981

ref: google