Hańcza is a lake in Suwałki Region, Podlaskie Voivodeship, Poland. It is 311.4 ha large, 4.5 km long and 1.2 km wide. It is the deepest lake in Poland with maximum depth of 108.5 m.
Wikipedia https://en.wikipedia.org/wiki/Hańcza
Address 16-427, Poland
Coordinates 54°15'51.211" N 22°48'41.373" E