The existence of the spa is due to a lucky accident: as a result of oil research drillings began in the 1920s and continued in the 1950s, a column of water of 65-70 metres high sprouted to the surface from a depth of 1 282 metres in 1957. The 58 °C warm water treasure containing 15 000 mg/l minerals opened a new chapter in the life of Bük and the surrounding settlements. The real success story began in 1962 with the opening of the first semi-covered pool. The Ministry of Health classified the thermal water of Bük as medicinal water in 1965, then the area as a health spa of regional significance in 1973, and Bükfürdő as a health resort of national significance in 1979. Due to continuous developments currently the spa complex contains 34 pools.