Asia's ARAL Sea is a landlocked body of water located between Kazakhstan and Uzbekistan. It was once the fourth largest lake in the world, but has since been reduced to a fraction of its original size due to the diversion of its tributary rivers for irrigation and other uses. The CASPIAN Sea is the largest enclosed inland body of water on Earth, located between Russia, Iran, Turkmenistan, Azerbaijan, and Kazakhstan. It is the largest lake in the world by area, and the third largest by volume.