Khan Tengri; it is 22,999 feet tall. Khan Tengri is part of the Tengri Tag mountain range which means 'Heavenly Mountain'. The mountain was found in 1847 by a Russian explorer who went by the name Pyotr Petrovich Semenov-Tyan-Shansky, though no one ever was able to successfully climb it until 1931 by a Ukraine team lead by Mikhail Pogrebetsky.