Op Luang National Park Op Luang National Park Op Luang National Park () is a national park in Chiang Mai Province, Thailand. It is home to a scenic river canyon, waterfalls, and caves. Op Luang National Park is about south of Chiang Mai in Chom Thong, Mae Chaem and Hot Districts. The park's area is . It is contiguous with Doi Inthanon National Park. Like Doi Inthanon Park, Op Luang is in the Thanon Thong Chai Range. Prehistoric paintings and other artefacts have been found in Op Luang National Park. The Doi Pha Chang area has a cliff painting of an elephant. Near Op
Highest unclimbed mountain had only one summit attempt back in 1957 when climbers came within of the summit; Nepal then banned future attempts. The mountain most widely claimed to be the highest unclimbed mountain in the world in terms of elevation is Gangkhar Puensum (). It is in Bhutan, on or near the border with China. In Bhutan, the climbing of mountains higher than has been prohibited since 1994. The rationale for this prohibition is based on local customs that consider this and similar peaks to be the sacred homes of protective deities and spirits, and the lack of high-altitude rescue resources from