Kaštela fortress
Central Bosnia Canton, Bosnia and Herzegovina · built 15
Kaštela or Kaštele is a cliff-hanging fortress built above the village of Rizvići, Fojnica, Bosnia and Herzegovina. The fortress is suspended against the cliffs of mount Zahor. It dates from the Middle Ages, from the time of the medieval Bosnian state.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).