The old town of Peñíscola is located 18 km from Mas del Rey. On a cloudless day you can see the castle, which was built in the 14th century, from the upstairs terrace. Peñíscola is a city steeped in history: Carthaginians, Romans, Arabs, Byzantines, Greeks and Phoenicians came in the course of past centuries. The castle, like many things in Peñíscola, bears the name of antipope Benedicto XII, who was actually called Papa Luna.
Peñiscola has become a coastal city that has all the tourist services and is mainly visited by Spaniards during the high season. It can be very busy there in July and August.
The beautiful old town, however, remains well worth a visit, especially early in the morning and preferably outside the season.