![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
![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/zooms/9/efebe7525e7e4e70801e1a09ca32fc47/r7je5b.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
![Festetics Day Spa in Heviz, Hungary. Thermal Medicinal Lake Entrance. Editorial Photo - Image of outdoor, holiday: 157485046 Festetics Day Spa in Heviz, Hungary. Thermal Medicinal Lake Entrance. Editorial Photo - Image of outdoor, holiday: 157485046](https://thumbs.dreamstime.com/z/heviz-hungary-august-thermal-medicinal-lake-entrance-summer-festetics-day-spa-festetics-day-spa-heviz-hungary-thermal-157485046.jpg)