 Probably the finest example of interaction of karst terrain and watercourses in the area are Plitvice Lakes—16 interlinked lakes between Mala Kapela and Plješevica, through which Korana River flows.The area is abundant in travertine barriers, waterfalls and caves of biological origin—created through deposition of calcium carbonate through agency of moss, algae and aquatic bacteria.The Plitvice Lakes are listed as a UNESCO World Heritage Site, and they are a part of one of three Croatia's national parks located in the Mountainous Croatia, along with Risnjak and Sjeverni Velebit.