The river Volga merges into the

The Volga River is the longest river in Europe and is considered the national river of Russia. It rises in the Valdai Hills northwest of Moscow and flows approximately 3,530 kilometres through Central Russia before discharging into the Caspian Sea, the world's largest inland body of water.

• Caspian Sea: The Volga enters here via a massive delta near Astrakhan.
• Black Sea: This sea receives rivers like the Danube, Dnieper, and Don.
• Mediterranean Sea: Major rivers like the Nile and the Rhone drain into it.
• Baltic Sea: Rivers such as the Vistula and Oder flow into the Baltic.

The Volga basin is home to nearly half of the Russian population and is a vital artery for irrigation, hydroelectric power, and inland navigation.