The old city is spectacularly situated atop a long, narrow promontory. It contains a wealth of monuments, including the cathedral, a famous ancient Roman aqueduct, the Alcázar, and various churches built in the Romanesque style including San Esteban, San Martin, and San Millan. The old city is a UNESCO World Heritage Site. The Alcázar, or castle-palace, is perched at the tip of the...