References to the „miraculous” springs, found at the location of the present spa, can be seen in scripts dated as early as the 15th century. This spa, having been larger and supplied by a spring hotter than the other Buda-based baths, used to be called „Purgatory” by the Ottomans. Another name given to it by the Turks was „The bath of virgins”, which refers to the unparalleled medical effect of the spa.

Contemporary sources reported about the building, completed in 1918, as follows: „… The monumental architecture, classical in its propertions but Hungarian in its design with a slight Oriental touch, of the enormous building of the Saint Gellért Spa and Hotel catch the eye of the visitors.” Indeed, the artistic impression of the spa, located near the Danube, is created by the wonderful sculptures, ceramic mosaic tiles and tinted glass incorporated. This artistic effect is present not only in the interior, but characterises the open air facilities, such as the pools and the wave pool, as well.

In the spa almost all health services are available, it has a complete physiotherapeutical department (outpatient hospital), a physiotherapy unit and an inhalatorium. Apart from the jacuzzi and the whirlpool, popular are the sun bathing roof terrace for women and the other one used jointly by naturists. The guests of Hotel Gellért are also regular visitors at the spa.