Phu Sang National Park
Phu Sang National Park located in Phu Sang District, Phayao province and Thoeng District, Chiang Rai province. The 284.8 km2 Park is watershed of many streams in Phayao, comprises of hill evergreen, deciduous and dipterocarp forest.
The are consists of mountain range, about 440-1,548 meters above sea level, close to the border of Lao, is the source of water of Lao River, Ngao River, Puea River, Bong River and Yuan River, which go to maintain the plantation of Chiang Kham District.