The building was opened in 1926 and replaced the traditional Royal Baths, a wooden amenity that dated back to the early 19th century. The poor condition of the huts caused the Provincial Council to announce a call to tender in 1924 to build a new spa.
It is a reinforced concrete complex that has two well defined hubs; the entrance building, built on the city wall, and the spa itself, built on pillars on the beach. It has a central zone flanked by towers topped with bulbous domes, attached to which there are two curved wings, at the ends of which there are domed buildings.