As you cross the Puente Romano (constructed in the reign of Julius Caesar and rebuilt many times since), you’ll see herons and egrets wading in the shallows and worshippers crossing themselves and leaving sprigs of rosemary at a small shrine to the archangel San Rafael at the mid-point of the bridge. The display rooms at the Torre are often crowded with school groups, so arrive early. The 1-hour audio tour evokes Córdoba of the 9th to 13th centuries, and is as valuable for vacationers as it is for kids studying history. One room features likenesses of some of Córdoba’s great thinkers, including Averroes, Maimonides, and Alfonso X.