Which river is the longest in Europe, emptying into the Caspian Sea via a massive delta?

💡 Solution & Explanation

The Volga River is the longest river in Europe, spanning over three thousand five hundred kilometers entirely within Russia before draining into the Caspian Sea. Other rivers like the Danube and Rhine are prominent European waterways but fall short of the Volga in total length. The Volga basin drains a significant portion of the European part of Russia.