The Wda (German: Black water) is a 210 km long tributary of the Vistula in the northern Poland in the voivodships Pomerania and Kuyavian Pomeranian. It is very popular with canoeists and anglers.
Run
The Wda arises in the Pomeranian Lake District near Bytów and flows southeast through the Kashubian Switzerland and the Tuchol Heath direction Vistula, taking them to several lakes - including the Weitsee - flows through in its upper reaches. In its lower reaches it becomes a Żurski reservoir jammed. It flows into Świecie in the Vistula. It overcomes a difference in altitude of almost 200 meters.
It flows through: