Ozalj Castle, 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 (first mentioned in 1244) that has been converted into a castle. The popularity of this castle is because this was the joint castle of the 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.References:
Frösöstenen is the northern-most raised runestone in the world and Jämtland's only runestone. It originally stood at the tip of ferry terminal on the sound between the island of Frösön and Östersund. The stone dates to between 1030 and 1050. It has now been relocated to the lawn in front of the local county seat due to the construction of a new bridge, between 1969 and 1971, on the original site.
Frösö runestone inscription means: Austmaðr, Guðfastr's son, had this stone raised and this bridge built and Christianized Jämtland. Ásbjörn built the bridge. Trjónn and Steinn carved these runes.