Spanning the Río Guadalquivir just below the Mezquita, the handsome, 16-arched Roman bridge formed part of the ancient Via Augusta, which ran from Girona in Catalonia to Cádiz. Rebuilt several times down the centuries, it's now traffic-free and makes for a lovely stroll. With the aid of CGI, it not long ago featured as the Long Bridge of Volantis in Game of Thrones.