Be part of this great experience and sign up for our private heviz geothermal lake and wellness tour this iseuropes biggest geothermal heated lake with all year around bathing and wellness facilities since the water temperature always stays between 26 38 degrees celsius even during the coldest winter months with various massages sauna wellness and mud bath you will surely be rejuvenated inside out the lake is situated near the western end of lake balaton with adjacent spa baths both outd