The Volga is the longest river in Europe. Situated in Russia, it into the Caspian Sea. The Volga has a length of 3,531 km. It is widely regarded as the national river of Russia. Astrakhan is the largest city and administrative centre of Astrakhan Oblast in Southern Russia. The city lies on two banks of the Volga. The Caspian Sea is the world's largest inland body of water.