Mustang, known as forbidden kingdom is largely insulated from the outside world. It is believed that there’re thousands of unexplored caves in Mustang. The National Geographic team; legendary climber Peter Athans, archaeologist Mark Aldenderfer and Photographer Cory Richards unearth the hidden relics of Nepal's ancient and remote caves and reveals the treasures waiting to be discovered within the sky caves of Nepal — stunning murals, deteriorating manuscripts, and ancient artifacts. National Geographic team talks about Mustang Sky Caves in the following videos. Video was released on YouTube few days back. Watch: National Geographic Live! Sky Caves of Nepal Image via National Geographic