A young monk in the Chhosher region stands in front of one...

TSOSHAR, UPPER MUSTANG, NEPAL - 2011/03/25: A young monk in the Chhosher region stands in front of one of the only occupied cave-homes in the area. Up until recently, most Loba native to this region lived in the cliffs. Hidden in the rain shadow of the Himalaya in one of the most remote corners of Nepal lies Mustang, or the former Kingdom of Lo. Hemmed in by the world's highest mountain range to the south and an occupied and shuttered Tibet to the north, this tiny Tibetan kingdom has remained virtually unchanged since the 15th century. Today, Mustang is arguably the best-preserved example of traditional Tibetan life left in the world. (Photo by Taylor Weidman/LightRocket via Getty Images)