If you are serious about antiques, this is the place to head. El Arcon is treasure trove of colonial and Republic-era antiques with an eclectic cache of furniture, religious statues, weapons, and off-beat decorative artifacts along with wooden doors, ceremonial plates, silverware, first-edition books, paintings, candelabras, lanterns, chandeliers, sconces, and Cartagena’s signature gargantuan door knobs.