The Ozalj fortress, located on the stone cliff perched above the Kupa river, is one of the best known fortifications of this type in Croatia. It is a very old stronghold which has been converted into a castle. The popularity of this castle is due to the fact that this was the joint castle of Croatian noble families of Frankopan and Zrinski. In fact, it was the scene of the unlucky Zrinski-Frankopan conspiracy, which significantly marked the history of Croatia. In the castle there is a museum and a library, and it is in a relatively good state of repair.
