Ostrozac, the early Iron Age hill fort, a medieval fortress and a Turkish city. The fortress is situated on a dominant hill above the left bank of the Una river and the eponymous village, 12 km from Bihac towards Bosanska Krupa. The fortress has an irregular round shape with circular guard tower next to the beautiful fountain. The first mention of the fortress is from year 1286. Ostrozac, old fortress and castle, is a true gem among many Bosnian fortress.