Above the modern town rises the acropolis of Lindos, a natural citadel which was fortified successively by the Greeks, the Romans, the Byzantines, the Knights of St John and the Ottomans. Some scenes of the well-known film, The Guns of Navarone, were filmed here.
Top 10 Greek castles to visit – Lindos Castle
The Guns of the Navarone, should ring some bells