World Heritage listed
Fraser Island is the largest sand island in the world and one of the most unique ecological masterpieces of Australia. With over 120 kilometres of beaches, pure fresh water lakes and ancient rainforests with a multitude of wildlife, there is so much to explore and see. (from
http://www.fraserexperience.com/new/images/fraser%20island%20fact%20sheet.pdf)
Much more here on Wikipedia:
http://en.wikipedia.org/wiki/Fraser_Island