The thermal lake of Hévíz              

The thermal lake of Hévíz is the largest biologically active, natural thermal lake of the world which refreshes both the body and the soul.
The oldest and most well-known bath of Hungary, in accordance with records from the Roman era, has a history of 2000 years. The Hévíz treatment, in its present sense, also dates back more than 200 years.
The 4.4 ha 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 85 hours. The water of the Hévíz 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.