The Thermal Lake of Hévíz is the world’s largest biologically active natural thermal lake.

The thousands of years old turf bottom thermal lake is fed by the cold and warm sources rich in minerals found in the 38 m deep source cave. The lake produced 410 l/sec., which means that water is changed every three days. The erupting water’s temperature at the source is 38,5 C and the lake’s temperature varies between 24 C and 38 C according to the season, which enables winter bathing. The steady and constant water flow has a beneficial effect on the body as it keeps bathers lightly massaged during the whole time they spend in the lake. Wildlife is unique due to the unique surroundings. The red water lily planted in the lake that flowers even in late autumn gives a beautiful sight.