The Lost Caves of Mustang documentary explores the cave temples found in Mustang, which is is the former Kingdom of Lo, where Tibetan languages are still widely spoken and traditional Tibetan culture remains. Mustang’s status as a kingdom ended in 2008 when its suzerain Kingdom of Nepal became a republic. The influence of the outside world, especially China, is growing and contributing to rapid change in the lives of Mustang’s people. In 2007 Liesl Clark filmed her husband Pete Athans and climber Renan Ozturk as they tried to access some of these caves, and record them for the first time. They had only a month to do the work on this visit, and they get off to a poor start being obstructed by snow blizzards. Eventually they get some fine weather and began the exploration in earnest, turning up long lost paintings and artifacts from the caves, including manuscripts.