remains of the walls and towers of kelefa castle, 17th-century fortress, near oitylo, greece

rock terrain geology cliff ruins mountain wall ridge badlands wadi trail fortification adventure valley formation walking plateau remains walls towers kelefa castle 17th-century ottoman fortress oitylo mani peninsula greece ancient architecture blue building castle city clouds coast environment europe famous fortress greece green hill historic historical history itilo laconia landmark landscape mani peninsula medieval mediterranean mountain mountains nature oitylo old outdoor peak peloponnese rock ruin ruins scenery scenic sky stone tower town view village