How big is the Caspian Sea?

Explanation

The Caspian Sea lies between Asia and Europe. It is classed as a lake, and is the world's largest, with an area of 371,800 km2 and a maximum depth of 184 metres. The Caspian Sea is rich on oil and gas. The biggest cities by the Caspian Sea are the Russian port city Astrakhan and the capital of Azerbaijan, Baku.