Phu Sang Waterfall is located in Phayao Province's Phu Sang National Park, Phu Sang Subdistrict, Phu Sang District. The waterfall's main attraction is that it has a warm water stream of around 35 degrees Celsius. It is situated between a warm-water absorbing pond and a freshwater swamp forest, with the warm-water absorbing pond serving as the source of the Phu Sang Waterfall. The Phu Sang Waterfall appears to be a warm stream flowing from beneath the surface. The surrounding environment is a freshwater marsh with a variety of difficult-to-find plants. Phu Sang Waterfall is about 300 meters from the park office and this route can continue to Ban Huak. Thai-Laos Men's Market and Phu Chi Fa, which are approximately 45 kilometers from Phu Sang National Park.