Balaton Uplands National Park Balaton Uplands National Park In 1997 a protected ecological system embracing the adjoining area of the Balaton Uplands (northern shoreland of the Lake Balaton) was established with the connection of the already protected areas which had been separate for a long time. The area of 56 997 hectares of the Balaton-felvidéki National Park mainly consists of these six landscape protection areas. The national park headquartered in Veszprém, in the largest city of the Balaton area. In 1952 the first protected landscape area of Hungary was created in the most attractive, most varied and scientifically best researched area of the country.
Bilećko Lake which was created in 1968. This is the only source of surface water in an area which is subject to extreme weather conditions in winter and also in summer. Čepelica is its small tributary in Bileća Rudine and is stated to be the best known subterranean river in Bosnia and Herzegovina. It lies in the Upper and central part of Trebsinjica valley 17 km from Trebinje is one of the largest lakes in the country. The landscape of the district where the lake is situated consists of lime stone mountains with bare karst formations Bilećko Lake Bileća Lake () is