Otočec Castle is a very unique castle in Slovenia because it is built on an island. It creates the most beautiful scenery, with the river passing by the castle.
Nowadays, Otočec is a 5-star hotel and can only be visited by guests or for events. You can walk around the property without problems, but only guests are able to go in.
If you are looking for a unique stay in Slovenia, this might be a great idea!