Pogubie Wielkie

Pogubie Wielki is a lake located in the Masurian Plains, on the terrain of the Puszcza Piska, to the South-Western direction of Pisz, near the village of Pogobie Średnie.The lake is polymictic with a round shape and a depth which does not have substantial difference. The lake's area is 670,8 ha, the length is 3,9 km, has a width of 2,5 km, and the depth to 2.6 metres. In the Northern part of the lake is located the island Ostrów Wielki with an area of 21 ha.

Source: Wikipedia