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 city clouds coast environment europe famous green hill historic historical history itilo laconia landmark landscape medieval mediterranean mountains nature old outdoor peak peloponnese ruin scenery scenic sky stone tower town view village