![The thermal lake Heviz is the largest natural thermal lake in the world. Heviz spa, Zala county, Western Transdanubia, Hungary, Europe Stock Photo - Alamy The thermal lake Heviz is the largest natural thermal lake in the world. Heviz spa, Zala county, Western Transdanubia, Hungary, Europe Stock Photo - Alamy](https://c8.alamy.com/comp/R7JE4X/the-thermal-lake-heviz-is-the-largest-natural-thermal-lake-in-the-world-heviz-spa-zala-county-western-transdanubia-hungary-europe-R7JE4X.jpg)
The thermal lake Heviz is the largest natural thermal lake in the world. Heviz spa, Zala county, Western Transdanubia, Hungary, Europe Stock Photo - Alamy
![People bathing at Heviz Spa, Hévíz Spa, largest thermal lake in Europe, Hungary, Europe Stock Photo - Alamy People bathing at Heviz Spa, Hévíz Spa, largest thermal lake in Europe, Hungary, Europe Stock Photo - Alamy](https://c8.alamy.com/comp/H2YGXH/people-bathing-at-heviz-spa-hvz-spa-largest-thermal-lake-in-europe-H2YGXH.jpg)
People bathing at Heviz Spa, Hévíz Spa, largest thermal lake in Europe, Hungary, Europe Stock Photo - Alamy
![The thermal lake Heviz is the largest natural thermal lake in the world. Heviz spa, Zala county, Western Transdanubia, Hungary, Europe Stock Photo - Alamy The thermal lake Heviz is the largest natural thermal lake in the world. Heviz spa, Zala county, Western Transdanubia, Hungary, Europe Stock Photo - Alamy](https://c8.alamy.com/comp/R7JE5B/the-thermal-lake-heviz-is-the-largest-natural-thermal-lake-in-the-world-heviz-spa-zala-county-western-transdanubia-hungary-europe-R7JE5B.jpg)