The Volga River, which flows entirely within Russia, is the longest river in Europe.
From its source in the hills northwest of Moscow, the Volga travels almost 2,300 miles (3,700 km) to the Caspian Sea.
Much of Russia’s freight is carried on barges on this river.
The Volga’s waters supply irrigation for the wheat farms along its banks and also power several hydroelectric plants.
The Danube River is Europe’s second longest, at almost 1,770 miles (2,860 km).
The Danube passes through Austria, Slovakia, Hungary, Yugoslavia, Bulgaria, and Romania before it empties into the Black Sea.
The Danube River flows through more countries than any other river in the world.