The Nattai National Park was set aside for the protection of geological features, landforms, biodiversity and catchments of the Sydney Basin. It is an inherent part of the pure wilderness and bushland of the Greater Blue Mountains World heritage Area. This park also protects the catchment area of Warragamba Dam. Almost 30,000 hectares area has been held as wilderness in the park. One can also indulge in self reliant recreation like backpack camping and minimum impact bushwalking. This can be done outside the exclusion zone of three kms around the Burragorang Lake. Geology and Landforms The park is a Sydney Basin