Doi Luang National Park Doi Luang National Park Doi Luang National Park () is one of the biggest national parks in Northern Thailand. It covers the Mae Suai, Phan and Wiang Pa Pao districts of Chiang Rai Province, Wang Nuea and Ngao of Lampang Province as well as Mae Chai and Mueang Phayao of Phayao Province. Doi Luang National Park is located in the northwesternmost mountain chains of the Phi Pan Nam Range and was established in 1990 by combining the area of four existing parks. 1,426 m high Doi Luang, a mountain located towards the northern end of the park in Mae Chai
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