The Wet Tropics of Queensland is a UNESCOWorld Heritage Site which is in a narrow strip along the east coast of Queensland, Australia. It starts just north of Townsville and continues to just south of Cooktown, a distance of about 450 km (280 mi). This is an area of 894,420 ha (2,210,160 acres) in 730 separate blocks of land which includes 41 national parks covering185,000 ha (457,145 acres). About 80% of the site is tropical rainforest. It is interesting because it is very old forest, and is a living record of 415 million years of evolution, going back to Pangea and Gondwana. All of Australia's marsupials, and many of its other animals, evolved in tropical rainforests, and many of their closest surviving ancestors still live in the Wet Tropics of Queensland.