Is this the underground Everest?

Far beneath a remote mountain range in Uzbekistan lies a winding underworld known as Dark Star. Eight expeditions have explored the cave so far—but no one knows how far it extends.

http://www.nationalgeographic.com/magazine/2017/03/dark-star-deepest-cave-climbing-uzbekistan/?utm_source=Facebook&utm_medium=Social&utm_content=link_fb20170207ngm-darkstar&utm_campaign=Content&sf54744609=1