The Northern Lowlands of Asia extend from the Ural Mountains in the west up to the Bering Strait in the north-east. These lowlands are traingular in shape and widest in the west. Lying between the Arctic Ocean in the north and the Central Mountains in the south,they form the world’s greatest continuous plains. Three rivers which flow northwards into the Arctic Ocean — Ob, Yenisey and Lena, have together built this plain. These marshy and swampy lowlands are also called as the Great Siberian plain. The lower courses and mouths of the rivers freeze in winter. So, water coming from the upper courses in warmer latitudes spreads out over large part of the plains. Another low lying land exists south of the Siberian Plains in Central Asia called as the Turan Plain. This plain is an area of inland drainage and is drained by rivers AmuDarya and SyrDarya.
