Pangong is a lake in the Himalayas, about 3-5 hour drive from Ladakh. To get there you have to drive along the cliff face on a narrow road up to over 17,000 feet and then back down the other side of the mountain to about 14,000 feet. There is an outpost at the top called Changla and the air is so thin, there is a sign that says "Humans should stay no longer than 20 minutes."
OK, technically the sign didn't single out humans per se.
But it prolly should have.