Doi Suthep large number of tourists is damaging the area's natural environment. Untreated waste water flows directly into the Huai Rap Sadet Waterfall. The annual Visakha Bucha pilgrimage up Doi Suthep leaves more than 30 tonnes of garbage in its wake. Doi Suthep Doi Suthep (ดอยสุเทพ), is a mountain ("doi") west of Chiang Mai, Thailand. It is in elevation and is one of the twin peaks of a granite mountain. The other peak is known as Doi Pui and is slightly higher (1,685 m). Doi Suthep is from Chiang Mai city centre. The vegetation below 1,000 m is mostly deciduous forest, with
Highest unclimbed mountain Highest unclimbed mountain An unclimbed mountain is a mountain peak that has yet to be climbed to the top. Determining which unclimbed peak is highest is often a matter of controversy. In some parts of the world, surveying and mapping are still unreliable, and there are no comprehensive records of the routes of explorers, mountaineers and local inhabitants. In some cases, even modern ascents by larger parties have been poorly documented and, with no universally recognized listing, the best that can be achieved in determining the world's highest unclimbed peaks is somewhat speculative. Most sources indicate that Gangkhar Puensum ()