Borač Fortress
Borač (Knić), Serbia
Borač (Serbian Cyrillic), also known as Borač na Kršu is a medieval town and fortress. The remains of the Borač fortress lie on top of a rocky hill 10km northwest of Knić and are protected as a cultural monument of great importance.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).