Where was Knife in the Water filmed?

Polish film by Roman Polański

Knife in the Water (1962) was filmed in Giżycko, Śniardwy, Mikołajki, Mikołajskie Lake, Kisajno and Jagodne, 6 places named in its Wikipedia article, in Poland. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data