In Castellón de la Plana, you can explore Plaza Mayor, a central square vibrant with historic buildings and cafes. Visit the Mercado Central for local produce and delicacies, and the Planetarium of Castellón for educational exhibits. Nature enthusiasts can hike in the Desert de les Palmes Natural Park. Cultural events are hosted at the Teatro Principal. Don't miss the Fadrí Tower for panoramic city views and the Gothic-style Concatedral de Santa María. Enjoy leisurely walks in Ribalta Park and art at the Museo de Bellas Artes. For coastal charm, head to El Grao de Castellón with its beaches and marina.