Loba children and monks gather atop a mud wall to watch...

LO MONTHANG, UPPER MUSTANG, NEPAL - 2011/05/31: Loba children and monks gather atop a mud wall to watch events during the Tiji Festival. 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)