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Also known as hydrotherapy center, spa center

thumb|right|200px|The medicinal spa of Harkány is supplied by thermal wells that produce high sulfide content chloride water containing sodium-, calcium- and hydrogen carbonate. A spa is a location where mineral-rich spring water (sometimes seawater) is used to give medicinal baths. Spa health treatments are known as balneotherapy. The belief in the curative powers of mineral waters and hot springs goes back to prehistoric times. Spa towns, spa resorts, and day spas are popular worldwide, but are especially widespread in Europe and Japan.