Church of Castelnou Monument · Castelnou, Bajo Martín, Teruel Image of Castelnou, not of the place itself. 18th-century church of la Inmaculada Concepción in Castelnou, with three naves, semicircular vaults, a polygonal apse and white-and-blue sgraffito decoration typical of the comarca. Photo: B25es (CC BY-SA 4.0) What to see and do in Castelnou