Walls still stand around most of the inner town. Along the west side (follow Rua dos Arcos) run the impressive remains of an 11th-century aqueduct . At the southern end is a huge 17th-century wheel pump (aka noria ), once used for pumping water along the aqueduct to the nearby Palácio dos Condes de Ficalho (still used by the de Ficalho family as a holiday home).
