A tunnel-valley lake, taking 24.5 hectares, located near the village of Ołobok. The locals call it “Lake Ołobockie”. Its average depth is 3 m, but locally can reach up to 6 m. The banks are overgrown with vegetation, in particular with common reed and bulrush. The lake can be accessed via multiple piers. Lake Czerniak is home to plenty of fish species, such as perch-pike, bream, roach and many more. It is a perfect place for those who like quiet and calm retreats.