Russia can be divided into an European and an Asian part. The dividing line is generally considered to be the Ural Mountains. The European part is drained into the Arctic Ocean, Baltic Sea, Black Sea, and Caspian Sea. The Asian part is drained into the Arctic Ocean and the Pacific Ocean.
Notable rivers of Russia in Europe are the Volga (which is the longest river in Europe), Pechora, Don, Kama, Oka and the Northern Dvina, while several other rivers originate in Russia but flow into other countries, such as the Dnieper (flowing through Russia, then Belarus and Ukraine and into the Black Sea) and the Western Dvina (flowing through Russia, then Belarus and Latvia into the Baltic Sea).