Great Barrier Reef

This natural color image shows a small portion of the Great Barrier Reef off the coast of Queensland, Australia. The image highlites the swirling sediment paterns which emerge from currents as they pass through the area and collide with sediments flowing from land.

Sydney

Surrounding one of the largest natural harbors in the world, Sydney is the largest city in Australia and Oceana with more than 4 million residents. The city extends to the west until it reaches the Blue Mountains.