Ural River, a river in southwestern Russia. It is sometimes considered part of the boundary between Europe and Asia. From its source in the southern Ural Mountains of Russia, the river flows south through Kazakhstan past the city of Orsk, then west to Uralsk, and then south again. The Ural empties into the Caspian Sea at Guryev. The river's total length is 1,575 miles (2,535 km). Much of the extreme northwestern part of Kazakhstan is irrigated by waters from the Ural.
Central Asia, an indefinite region in the interior of Asia. It is generally considered to extend in a broad band from the Caspian Sea into the Xinjiang region of China, covering roughly the same area as Turkestan.
Tonle Sap, a lake in central Cambodia, drained by the Tonle Sap River. During the rainy season the lake receives water from many streams, mainly the flooding Mekong River, and greatly increases in size, inundating surrounding areas.