Lined with fine ancient buildings, Plaza del Cabildo is the centre of the old town, its vertiginous mirador affording exquisite vistas over the Río Guadalete. The 11th-century, Moorish-built Castillo de los Duques is closed to the public, but its outer walls frame classic Arcos views. On the square's eastern side, the Parador de Arcos de la Frontera is a reconstruction of a 16th-century magistrate's house.
