), Mustāṃg fertile plain), formerly Kingdom of Lo, is a remote and isolated region of the Nepalese Himalayas. The Upper Mustang was a restricted demilitarized area until 1992 which makes it one of the most preserved regions in the world, with a majority of the population still speaking traditional Tibetic languages. Tibetan culture has been preserved by the relative isolation of the region from the outside world. Life in Mustang revolves around tourism, animal husbandry and trade.