Vanished castle of Guardo Monument · Guardo, Alto Carrión, Palencia Image of Guardo, not of the place itself. Of the fortress that controlled the passage of the Carrión between the kingdoms of León and Castile nothing remains standing today; only the Romanesque baptismal font of the parish church is connected with the hermitage that its enclosure housed. Photo: Alejandro Polanco (CC BY 3.0) What to see and do in Guardo