Doi Phu Nang National Park Doi Phu Nang National Park Doi Phu Nang National Park () is a national park in Dok Khamtai, Pong and Chiang Muan Districts, Phayao Province, Thailand. It is located in two mountain chains of the Phi Pan Nam Range, Mae Yom and Nampi, with a not-protected area in between. There are both mixed evergreen forests, dipterocarp forest and dry deciduous forests in the park area. Doi Phu Nang, the mountain that gives its name to the park, with an altitude of 1,202 m, is the highest peak in the area. The sources of two tributaries of the Yom River are
Highest unclimbed mountain in Bhutan or on the Bhutan-China border is the tallest mountain in the world that has yet to be fully summited. Gangkhar Puensum has been off limits to climbers since 1994 when Bhutan prohibited all mountaineering above due to spiritual/religious beliefs. Unclimbed mountains are sometimes referred to as "virgin peaks". Many virgin peaks exist because the mountain is unreachable, due to either geographic isolation or political instability. Some mountains remain off limits due to religious beliefs of a country or region that hold such mountains are sacred and should remain inviolate. Additionally, since the endeavor to scale taller mountains of