Airs Wednesday, November 18, 2009 at 9:30 p.m. on KPBS TV
Credit: Pete Athans ©2009 National Geographic Television
Above: In a remote corner of the Himalaya , in the forbidden Kingdom of Mustang , a team of climbers clambers into the mysterious caves for the first time and uncovers ancient cave temples lost to the modern world. Pictured: A cave complex in Upper Mustang, Nepal .