At the southeast from the Kosh-Agach village, through Chujsky Steppe the road to a ridge of Sajljugem, on a plateau of Ukok where there are rooms of the world famous Altay Princess lies. On a way to a plateau lies the pass Warm Key. This is very difficult off-road pass, the highest point at 3100 m above sea level. The main place of interest of this point of a route, besides amazing panoramas of the Sajljugem rigde, is a geothermal source – «the Warm Key». This source is a local Relic and possesses salutary properties, it is not investigated yet by scientists, and its curative properties, are based on local people's Belief in power of the father - Altai. At the pass bottom there is a picturesque Tarhatinsky lake.