Castles and Ruins

Karlovac County features a dense network of medieval fortifications and Renaissance castles primarily built by the noble Frankopan and Zrinski families. These sites, ranging from the well-preserved Dubovac Castle to the evocative ruins of Cetin and Modruš, served as critical defensive positions along the historical border with the Ottoman Empire. Visitors can explore various architectural styles, including the rare water-fortress at Ribnik and the high-cliffed stronghold of Ozalj overlooking the Kupa River.

Dubovac Castle

Dubovac Castle is a castle in Karlovac, Croatia.The Dubovac Castle overlooks the Croatian city Karlovac.

Frankopanski kaštel

Built by Bernardin Frankopan around 1500, this Renaissance fortress sits above the Đula's Abyss. It currently houses the Ogulin Heritage Museum, showcasing local history and ethnographic collections.

Ozalj Castle

Ozalj Castle is a castle in the town of Ozalj, Croatia.

Stari grad Novigrad

A medieval fortress on the Dobra River, formerly a Frankopan stronghold. The site features a restored pentagonal tower and defensive walls overlooking the river valley.

Cetin Castle

The fortress of Cetin is situated 5 kilometres south of Cetingrad above the village of Podcetin, in Croatia.

Tržan Castle in Modruš

The Tržan Castle is a ruined medieval castle above the village of Modruš in the northern part of historical Lika region, central Croatia.

Stari grad Bosiljevo

A Frankopan castle featuring a blend of Gothic and Renaissance architecture. Surrounded by a protected park, the complex includes defensive towers and a central courtyard.

Stari grad Klokoč

Ruins of a medieval fortress near Vojnić. Historically owned by the Klokočki and Frankopan families, it served as a defensive outpost during the Ottoman wars.

Skrad

Ruins of a 15th-century medieval fortress situated on a steep hill overlooking the Korana River. It was a strategic point in the regional defensive system.

Donji Budački

Site of a former medieval fortress and later a monastery. The ruins reflect the area's strategic importance during the Military Frontier period.

Stari grad Barilović

A 15th-century fortress built on a rocky outcrop above the Korana River. It served as a military base for the Austrian army during the wars with the Ottoman Empire.

Barilović

Medieval fortification ruins in the Korana river canyon. The site served as a defensive stronghold for the Barilović family and was later incorporated into the Military Frontier.

Stari grad Ribnik

A rare example of a water-castle (wasserburg) in Croatia. Built in the 13th century and later expanded by the Frankopans, it features a defensive layout formerly protected by a moat.