Pilica

Pilica is a river in central Poland that is the Vistula's longest left tributary, with a length of 333 kilometers (8th longest) and a basin area of 9,258 km2 (all in Poland).
It runs across the Polish Jura before entering the Central Polish Plains. Pilica runs into the Vistula near the hamlet of Ostrowek in the Central Vistula Valley. In 1974, a dam near Sulejow was erected, culminating in the development of the 2,700-hectare man-made reservoir Sulejow Lake. The territory in the Pilica's basin is known as Nadpilicze, and the river itself forms the border between Lesser Poland and two other historical provinces of the nation, Greater Poland and Mazovia.

The Open-air Museum of Pilica River, Poland's first "open-air river museum," is located on the river, and the Blue Springs natural reserve is nearby.

Total Length: 198 miles