8. Great Barrier Reef
The Great Barrier Reef, off the coast of Queensland in northeastern Australia, is a biological wonder as it is the largest coral reef on the planet. It comprises of 900 islands and close to 3000 individual reefs. Tourists enjoy plenty of water sports activities in the region. Notably, this is only living organism on earth that can be viewed from Outer space. The Great Barrier Reef marine park has been set up to safeguard the region from human intervention.
