A vast area of 16,178 km2—Altai and Katun Natural Reserves, Lake Teletskoye, Mount Belukha, and the Ukok Plateau—comprises a natural UNESCO World Heritage Site entitled Golden Mountains of Altai. As stated in the UNESCO description of the site, the region represents the most complete sequence of altitudinal vegetation zones in central Siberia, from steppe, forest-steppe, mixed forest, subalpine vegetation to alpine vegetation. While making its decision, UNESCO also cited Russian Altai's importance for preservation of the globally endangered mammals, such as snow leopard and the Altai argali. Siberian ibex also live in these mountains. The Uvs Nuur basin is also a protected site.