Upper Mustang is a remote, culturally rich region in northern Nepal, near the Tibetan border. Known as the "Last Forbidden Kingdom," it was isolated until the 1990s. The area features stark desert landscapes, ancient monasteries, and the walled city of Lho-Manthang. Predominantly inhabited by Tibetan Buddhists, Upper Mustang offers a unique blend of Tibetan culture and stunning views of the Annapurna and Dhaulagiri mountain ranges. The Upper Mustang Trek is a popular route for those seeking adventure and cultural exploration.