Fascinating fact About Australia is that it is home to the Great Barrier Reef, the world's largest coral reef system, which stretches over 2,300 kilometres. This underwater wonder is so vast it can be seen from space and supports an incredible array of marine life. Additionally, Australia has a unique array of wildlife, including the kangaroo and koala, and is known for having the world’s longest fence, the Dingo Fence, which stretches over 5,600 kilometers and was originally built to keep wild dingoes away from livestock.