The town of Aoiz lies 28 kilometres from Pamplona in the heart of the pre-Pyrenean river valleys that lead on to the Central Zone of Navarre. A noble four-arched medieval bridge, the Bidelepu, watches over the waters of the river Irati flowing down from the Pyrenees. In the historical centre of Aoiz, which was walled until the 16th century, you can see examples of mansions built from ashlar stones, some of them sporting coats-of-arms, with pointed doorways, wooden lintels and Baroque windows. The most notable of these is the house of the Argamasilla de la Cerda family, a Renaissance-style building with an L-shaped layout. Standing opposite this noble house, at the north end of the town, is the imposing church of San Miguel. Near Aoiz is the viewpoint over the Irati River, from which you can see the old sawmill of Ekai, a group of industrial buildings from the early 20th century.