Grad Ostrovica

Hochosterwitz Castle (German: Burg Hochosterwitz, Slovene: Grad Ostrovica) is a castle in Austria, considered one of Austria's most impressive medieval

The Ostrovica Castle (Bosnian: Stari grad Ostrovica, Ottoman Turkish: Ostroviçe kalesi) is a large medieval structure situated above the small village

river itself, and other nearby springs (Klokot, Vedro Polje, Dobrenica, Ostrovica). The discharge of the spring varies from a minimal 0.076 m3/s (2.7 cu ft/s)

is today referred to as Jerinin Grad (Eirene's City), even though it is much older. Though deemed indomitable, Ostrovica was conquered by the Ottoman sultan

Kostajnica, Kozarska Dubica, Kneževo, Kotor Varoš, Laktaši, Mrkonjić Grad, Novi Grad, Prijedor, Sanski Most, Šipovo, Velika Kladuša, Teslić, and Prnjavor