One day
Start in the old town on the Plaza Mayor and the early Gothic cathedral, then walk to the Hanging Houses and step inside for the Museum of Spanish Abstract Art. Cross the Puente de San Pablo for the classic view back across the gorge, climb to the castle-top viewpoints over both ravines, and have a highland lunch of morteruelo and roast lamb. Walk a stretch of gorge path in the afternoon, and return for the floodlit Hanging Houses at night.