shows that bath operators are modernizing their facilities and expanding the services offered. A total of 50 of the 160 public baths are qualified as spas throughout the country. Services are offered for healing purposes. These spas provide every type of balneal and physical therapy. The wine-growing terroir of Egerszalók The spa at Egerszalók is noted for its position in one of the principal wine-growing regions of Hungary. Egerszalók is also notable for human-caused geological morphology: when the spa was expanded by the government in 1961, the flow of supersaturated mineral water sharply increased, leading to the deposition of a hillside of shining white travertine. The thermal lake of Hévíz Lake Hévíz is the largest biologically active, natural thermal lake in the world. The oldest and most well-known bath of Hungary, in accordance with records from the Roman era, has a history of 2,000 years. The Hévíz treatment, in its present sense, also dates back more than 200 years. The 4.4 ha (11 acre) lake is fed by its spring rushing up at a depth of 38 m, containing sulphur, radium, and minerals. Due to the high water output of the spring, the water of the lake is completely changed within 48 hours. The water of the lake is equally rich in dissolved substances and gases, combining the favourable effects of naturally carbonated medicinal waters and those containing sulphur, calcium, magnesium, hydrogen-carbonate, as well as those with a slightly radioactive content. The medicinal Hévíz mud, which is unique of its kind, contains both organic and inorganic substances and the radium-salts and reduced sulphuric solutions in it represent special medicinal factors. The temperature of the water is 23–25 °C in winter and 33–36 °C in summer. Folk dance Ugrós (Jumping dances): Old style dances dating back to the Middle Ages. Solo or couple dances accompanied by old style music, shepherd and other solo man's dances from Transylvania, and marching dances along with remnants of medieval weapon dances belong in this group. Karikázó: a circle dance performed by only women, and accompanied by singing of folksongs. Csárdás: New style dances developed in the 18th and 19th centuries, is the Hungarian name for the national dances, with Hungarian embroidered costumes and energetic music. From the men's intricate bootslapping dances to the ancient women's circle dances, Csárdás demonstrates the infectious exuberance of the Hungarian folk dancing still celebrated in the villages. Verbunkos: a solo