Most of the area falls under the protection of the Fiordland National Park, part of the Te Wahipounamu World Heritage Site. Fiordland National Park has an area of 12,600 square kilometres, making it the largest national park in New Zealand and one of the larger parks in the world, containing many tourist attractions, such as Milford Sound, Doubtful Sound and the Milford Track. The main threat to natural habitats is from introduced species, especially red deer, but these are now being hunted out of the area, and furthermore the park includes a number of small offshore islands which are free from introduced species and are designated Specially Protected Areas.