Warta basin

The river Warta ( , ; ; ) rises in central Poland and meanders greatly through the Polish Plain in a north-westerly direction to flow into the Oder at Kostrzyn nad Odrą on Poland's border with Germany. About long, it is the second-longest river within the borders of Poland (after the Vistula), and the third-longest Polish river after the Oder (which also flows through the Czech Republic and Germany). Its drainage basin covers . The Warta is navigable from Kostrzyn nad Odrą to Konin - approximately half of its length.