The Great Barrier Reef is the largest coral reef in the world. Located next to Queensland in Australia, over 2,900 smaller reefs and 900 islands form the giant reef system that can be seen from space. Composed of and built by billions of tiny coral polyps, the reef is the biggest structure made by living organisms on Earth. Great Barrier Reef is listed as a UNESCO World Heritage Site.
Uluru is a large rock formation in central Australia. Uluru is sacred to the Aboriginal people of the area, who left their cave paintings on its surface. Uluru is protected by UNESCO as part of the Wolrd Heritage List.
Kakadu National Park is a National Park located Northern Australia. Very rich on plants and animals, the park has cave art left by humans that lived there for a least 40 thousand years. The Kakadu National Park is in the UNESCO World Heritage List.