Upper Mustang is wonderfully quiet- as if it were a forgotten corner of the world. I met perhaps only 5 other non locals on my trip, something quite unusual in Nepal- which's paths is often swarming with other hikers.
This Hindu priest (I believe so, mistake me if I'm wrong!) was on his pilgrimage to the Damodar kunda lake. Mean whilst I went to Lo Man Thang, also very recommendable!