Castellón de la Plana (Spanish: [kasteˈʎon de la ˈplana]), Castelló de la Plana (Valencian: [kasteˈʎo ðe la ˈplana]), or simply Castellón / Castelló, is the capital city of the province of Castelló, in the Valencian Community, Spain, in the east of the Iberian Peninsula, on the Costa del Azahar by the Mediterranean Sea. The mountain range known as Desert de les Palmes rises inland north of the town.