Hévíz (Hungarian pronunciation: [ˈheːviːz]) is a spa town in Zala County, Hungary, about 8 kilometres (5 miles) from the city of Keszthely.

The biological stability of the lake is shown by the temperature of the water, which has not changed for years[3] and even on the coldest winter days does not drop below 24 °C (75 °F).

[4] The lake's healing properties have been well known for centuries by people who lived here, as far back as the end of the Stone Age.

The city and the bath began developing significantly in the 18th century, related to the Festetics family, who started scientific research about using the water for healing.

[5] The city provides facilities for visitors seeking to use the medicinal waters of the lake, including entertainment, hotels, parks, and sports.