Vistula

The Vistula ( /ˈvɪstʃələ/; Polish: Wisła, German: Weichsel) is the longest river in Poland, at 1,047 km (651 miles) in length. The watershed area of the Vistula is 194,424 km2 (75,068 sq mi), of which 168,699 km2 (65,135 sq mi) lies within Poland (splitting the country in half).