The Altai Mountains (Altay Mountains) are a mountain range in East-Central Asia, where Russia, China, Mongolia and Kazakhstan come together, and are where the rivers Irtysh and Ob have their headwaters. The northwest end of the range is at 52° N and between 84° and 90° E (where it merges with the Sayan Mountains to the east), and extends southeast from there to about 45° N and 99° E, where it gradually becomes lower and merges into the high plateau of the Gobi Desert.
In Turkic and Mongolic languages, the name, Altai, means the "Golden Mountain"; al meaning red/gold and tai/tag, mountain. (Chinese: 金山; literally "Gold Mountain" in Chinese texts). The proposed Altaic language family takes its name from this mountain range.
Siberia (/saɪˈbɪəriə/; Russian: Сиби́рь, tr.Sibir'; IPA: [sʲɪˈbʲirʲ] ( listen)) is an extensive geographical region constituting almost all of North Asia. Comprising the central and eastern portion of the Russian Federation, Siberia was part of the Soviet Union (USSR) from its beginning, as of its predecessor states, the Tsardom of Russia and the Russian Empire since the 16th century.