The Vistula is the longest river in Poland and the ninth-longest in Europe, at 1,047 kilometres in length. Its drainage basin, extending into three other countries apart from Poland, covers 193,960 km2 (74,890 sq mi), of which 168,868 km2 (65,200 sq mi) is in Poland.

Sandomierz is a historic town in south-eastern Poland with 23,863 inhabitants, situated on the Vistula River near its confluence with the San, in the Sandomierz Basin. It has been part of Świętokrzyskie Voivodeship since its transfer from the Tarnobrzeg Voivodeship in 1999. It is the capital of Sandomierz County. Sandomierz is known for its preserved Old Town, a major cultural and tourist attraction which the President of Poland declared a National Monument of Poland in 2017.