Remains of the Castle of Almassora Monument · Almassora, La Plana Alta, Castellón Image of Almassora, not of the place itself. Remains of the historic structures of the old castle of Almassora, integrated into the town's urban centre. The castle, of Muslim origin, sits on archaeological remains from earlier periods, corresponding to the Iberian era and the Middle Bronze Age, revealing a continuous occupation of the site since prehistoric times. Photo: Viquipèdia / Wikimedia Commons (CC BY-SA) What to see and do in Almassora