The Parque Natural de la Sierra de Irta is a protected area located in the Baix Maestrat region, in the north of Castellón province. It is characterised by being a coastal mountain range with cliffs that combines mountainous landscapes and Mediterranean coastline, extending across the municipal areas of Alcalà de Xivert, Santa Magdalena de Pulpis and Peñíscola. The park was declared a Natural Park and Marine Nature Reserve by the Valencian Government on 16 July 2002, thereby recognising its status as one of the last undeveloped coastal areas of the Spanish Mediterranean.

Together with the Serra d'Irta Marine Reserve, the area forms a natural continuum of great ecological value that protects both the terrestrial territory and the adjacent marine strip. The joint declaration of natural park and marine reserve is a distinctive feature that reflects the determination to conserve the ecosystem in an integrated manner, from the mountain peaks to the coastal seabeds.

The park also houses relevant cultural and historical heritage. The territory has been inhabited since ancient times, as evidenced by various archaeological remains. Among the most notable heritage elements are Xivert Castle and the connection of the place with Benedict XIII, the Antipope Luna, who used this setting as a residence. This historical background adds an additional dimension to a space that is usually visited mainly for its natural values.