The Great Barrier Reef is the largest natural wonder of the world. This is a massive reef located in Australia and can be accessed by Cairns and many other cities in Australia. There is Amazing Scuba Diving here including live-aboard scuba diving for very reasonable prices (approx $550-750 AUS starting). This area can be snorkelled and there are many tour companies that offer day expeditions to the reef. This is located in a tropical location very close to the equator. Cairns, the small town located off the great barrier is a hippie paradise with tons of restaurants, bars, and shopping.