The lake framework is contained 16 named and a few more modest anonymous lakes, falling one into the following. Because of the topographical substrate and trademark hydrogeological conditions, the lake framework has been isolated into the Upper and Lower lakes. The twelve lakes shaping the Upper Lakes are: Prošćansko jezero, Ciginovac, Okrugljak, Batinovac, Veliko jezero, Malo jezero, Vir, Galovac, Milino jezero, Gradinsko jezero, Burgeti and Kozjak. These lakes were framed on impermeable dolomite rock, and are bigger, with more indented and gentler shores than the Lower Lakes. The
Lower Lakes, comprising of the lakes Milanovac, Gavanovac, Kaluđerovac and Novakovića Brod, were framed in penetrable limestone substrate, cut into a profound gorge with steep bluffs. The lakes end in the great cascades Sastavci, with the Korana River springing under the foundation of the falls.