Lake Kruki is a complex of 3 reservoirs located in Oświęcim near the streets: Spokojna, Szpitalna, Pod Krukami. These are 3 artificial reservoirs A, B, C to which water flows from the Soła River. The youngest reservoir C is over 30 years old, and the oldest A is over 60 years old. They serve as industrial water reservoirs for the Chemical Plant (Synthos Dwory Sp. z o.o.). The depth of these lakes reaches up to 12 meters.