Phu Soi-dao National Park is situated in an approximately area of 340.21 square kilometersi, covering the areas of Pa Nam-pad National Conserved Forest, Tambol Muang-jedton, Tambol Na-khum, Tambol Ban Koak, Ban Koak District, Huai Moon District, Nam-pad District of Uttaradit Province, and Tambol Bor-pak, Chattrakarn District of Pittsanulok Province. The topography of the National Park consist of beautiful virgin forests, which are the sources of streams and rivers. Major sightseeing spots include Phu Soi-dao Waterfall, a beautiful 5-step waterfall situated in an approximate area of 1,000 rai, which can be accessed by an asphaltic road to facilitate the travelling for recreational purpose.