On a travertine cliff stands a castle, unique in its turrets, vast park, and underground cave. It was built in the 9th century, namely for the royal family. During its existence, it was rebuilt several times. On the recommendation of many tourists, you cannot miss the opportunity to appreciate a real work of art in the form of the Boynice altar. It is located in one of the castle towers, and was made by a Florentine master in the 14th century.