On the Castilla Canal, one of the most interesting tourist routes in Castile-León. Its old town has been declared Property of Cultural Interest.

The imposing town of Dueñas is just 20 kilometres from the city of Palencia. It stands on a hill, overlooking the beautiful natural scenery of the Carrión and Pisuerga river plains. Its old town, with many churches, palaces and historic monuments, has been declared a Historic-Artistic Site. The Puerta del Ojo de la Virgen remains from the old enclosed area as do the remains of the castle. The Church of Saint Mary, from the 8th century and that is in late Romanesque style, holds many artistic treasures, both on the inside and in its museum: the main altar, the figure of San Isidro by Gregorio Fernández and the Image of the Ecce Homo by Diego de Siloé are only some of them. The old Convent of San Agustín is the current headquarters for the Historic Archive and the House of Culture. The church from the 16th century is still there, with its impressive center area and the cloister area located behind the convent. The Palace of the Buendia and the Hospital of Santiago are other must see buildings. Plaza de España Square catches the eye with its typical Castilian arcades. Taking San Juan Street brings us to the Shrine of Cristo (Christ) and to an area with many cellars. The Justas Poéticas viewpoint offers a fabulous panorama of the surrounding landscape. On the outskirts is the Monastery of San Isidro, belonging to a Cistercian order, whose origin dates back to the 10th century.