Castell de Morella rises on a rocky promontory at 1,072 metres altitude, crowning the walled city of Morella in the Els Ports region. Declared a Heritage Site of Cultural Interest (BIC), it constitutes one of the most imposing defensive complexes of the Crown of Aragon and the western Mediterranean. Its strategic position historically controlled the passages between the plains of the Ebro to the northwest and the Valencian and Castellón coasts to the east.

The site experienced Islamic occupation until 1232, when Blasco de Alagón conquered it on behalf of King James I of Aragon. From that point onwards, the great Christian fortress that can be visited today was developed, albeit in a state of partial ruin. Throughout the centuries the castle was the scene of decisive episodes, including the arrival of Pope Benedict XIII (Papa Luna) in the fifteenth century and the sieges of the Carlist wars of the nineteenth century, which caused significant damage to the structure.

Architecturally, the castle exploits the living rock as base and foundation, integrating towers, stretches of wall, an inner enclosure with a Gothic church and various military and residential outbuildings. The complex is complemented by the urban walling system of 2.5 kilometres surrounding the city, with seven gates or portals still standing.

Currently the castle is undergoing conservation work and is open to visitors. The route, mostly open-air, allows you to tour the various walled enclosures and enjoy panoramic views over the Els Ports region. Inside, a detailed scale model of Morella's urban complex is displayed.

Access is from the historic centre of Morella, going up the path that begins next to the Basilica of Santa María la Mayor. The town, considered one of the most beautiful in Spain, also concentrates other notable monuments such as the medieval aqueduct, the Convent of San Francisco and the Museu del Temps de Dinosaures.