At the foot of the Cathedral of Girona, a small dome rises above a stone building, it is the lantern of the Arab baths that defines the image of this wonderful jewel, It is a unique Roman building inspired by the Roman public baths, and its highlights include a changing room (apoditerium), a small octagonal swimming pool surrounded by slender columns, a frigidium for warm water, and a caldarium (a type of sauna) heated by an underground furnace.