Gacko

thumb|200px|Klinje lake thumb|250px|Gacko Gacko () is a town and municipality in Republika Srpska, Bosnia and Herzegovina. It is situated in the region of East Herzegovina. As of 2013, the town has a population of 5,784 inhabitants, while the municipality has 8,990 inhabitants.

karst field in Bosnia and Herzegovina

medieval castle in Gacko, Bosnia and Herzegovina

Duke of Serbia