Old Town of Segovia and its Aqueduct

Roman engineers raised Segovia's aqueduct around 50 CE without a drop of mortar, and its double tier of granite arches still strides across the city as if the empire had never left. Behind it climbs one of Castile's loveliest old towns: the ship-prowed Alcázar first begun around the 11th century, the Gothic cathedral of the 16th century — among Spain's last — and lanes of Romanesque churches. UNESCO inscribed the Old Town and Aqueduct in 1985.