On a spur of rock rise the crenellated walls and towers of the Castle of Port de Junch built in 1278 on the foundations of an ancient acropolis. The Frankish fortress, which consists of a circuit wall and a keep, commands the lagoon and the ancient port of Pylos. At the foot of the cliff there is a cave with stalactites, named after King Nestor, which is linked to the castle by an underground passage.