Caspian Depression
Astrakhan (; ), is the largest city and administrative centre of Astrakhan Oblast in Southern Russia. The city lies on two banks of the Volga, in the upper part of the Volga Delta, on eleven islands of the Caspian Depression, 60 miles (100 km) from the Caspian Sea, with a population of over 529,739 residents. At an elevation of below sea level, it is the lowest city in Russia.