Which river is the longest in Europe, flowing entirely through Russian territory and emptying into the Caspian Sea?

💡 Solution & Explanation

The Volga River holds the distinction of being the longest river in Europe, flowing entirely within Russian borders into the landlocked Caspian Sea. Other major European rivers like the Danube cross multiple international boundaries before reaching the Black Sea. The Volga basin forms the heartland of Russia's historical and economic development.