Proclaimed a national park on 8 May 1981. With a total area of 213 square kilometres (82 sq mi) in Si Satchanalai and Thung Saliam Districts, Si Satchanalai offers trekking routes through waterfalls and caves. There is Tad Dao Waterfall, originating from the Tha Pae stream. Thara Wasan Cave, with fantastic stalactites and stalagmites, is about 1.5 kilometres (0.93 mi) away from the park's office. Wildlife is found here, including hundreds of thousands of bats. Tad Duan Waterfall, about 500 m from the office of the park, is ideal for swimming.