Poland's third largest lake and the biggest coastal one - 71 km² of water averaging a metre and a half deep, separated from the Baltic only by a strip of shifting dunes. The clearest view is from the tower at Kluki, or from the top of Rowokół hill.
Not quite a lake in the usual sense, not quite a bay. Łebsko is a flooded coastal meadow, left behind when the Baltic rose enough to swallow it. The River Łeba feeds it, a narrow channel at the town of Łeba mixes its water with the sea, so it runs brackish. 71.4 km², a maximum depth of 6.3 metres, averaging a metre and a half. The third largest lake in Poland, after Śniardwy and Mamry.
The whole lake sits inside Słowiński National Park under active protection. No beaches, no swimming, no water sports. In return, it's one of Europe's richer bird sites: swans, cormorants, cranes, white-tailed eagles, and thousands of migrants in spring and autumn. The Łeba Spit's dunes bury the northern shore. The lake loses a few hectares a year.
From Rowy, two sensible options. The viewing tower and wooden pier at Kluki on the southern shore - about 40 minutes by car plus a short walk from the car park (the last half-kilometre is a sandy track), free entry, always open. The Kluki open-air museum of Slovincian village life sits right next door, so pair the two. Or the viewing deck on Rowokół hill, which takes in the whole lake at once - 15 minutes by car plus a 20-minute climb. Dogs aren't allowed at either site - both are park territory.