Balaton Sound Balaton Sound Balaton Sound, also known as Heineken Balaton Sound between 2007 and 2012 and as MasterCard Balaton Sound since 2013 for sponsorship reasons) is one of Europe's largest open air electronic music festivals. Held annually since 2007 on the southern bank of Lake Balaton, Hungary, it features live acts and DJ's from all around the world, from established artists to new names. The event was co-created by the organizers of Sziget Festival. As the festival gets more famous and popular each year, tickets are usually sold out before they go on sale at the official ticket vendors; this event
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