Mustang was an ancient forbidden kingdom, bordered by the Tibetan Plateau and sheltered by some of world's tallest peaks, including 8000-meter tall Annapurna and Dhaulagiri. Strict regulations of tourists here have aided in maintaining Tibetan traditions. Upper Mustang was a restricted demilitarized area until 1992, which makes it one of the most preserved regions in the world due to its relative isolation from the outside world, with a majority of the population still speaking traditional Tibetic languages. The name ``Mustang`` is derived from the Tibetan word meaning, ``Plain of Aspiration.`` Upper Mustang was only opened to foreigners in 1992 (annual quota at present of 1,000 people). It is a popular area for trekking and can be visited year round (regardless of season).