Blagaj Fortress

Blagaj Fortress or Old Town of Blagaj (Bosnian, Croatian and Serbian: Stari grad Blagaj, Serbian Cyrillic, pronounced [blaːgaj]), locally known as Stjepan-grad, or Stipan-grad, in classical times Bona, is a town-fortress complex near the town of Blagaj, Bosnia and Herzegovina. The old Blagaj Fort was built on a high, inaccessible karst hill, at an elevation of 310 metres (1, 020 ft) above sea level and 266 metres (873 ft) above the source of the river Buna. Blagaj Fort is 275 metres (902 ft) above sea level. Fortress is National monument of Bosnia and Herzegovina, declared by KONS on 6 December 2003.

Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).