Beach of el Serradal Nature · Castelló de la Plana, La Plana Alta, Castellón A beach with a bird micro-reserve and a protected dune system where the Kentish plover nests, one of the last unspoilt stretches of coast in the city of Castelló. Photo: Juan Emilio Prades Bel (CC BY-SA 4.0) What to see and do in Castelló de la Plana