Plitvice Lakes National Park, one of the most beautiful national parks in Europe – is an area of 16 magnificent small and large lakes interconnected by cascades and waterfalls. This is an outstanding geological and hydro-geological karst phenomenon. Travertine barriers are surely the major phenomena in this national park. This national park has rightfully been listed as a UNESCO’s natural World Heritage site. The lakes are located in a wooded, mountainous part of Lika. A walk along the forest paths by the lakes is truly refreshing during hot summer months.