Lake Hévíz among Rotatorias as well ("Epiphanes brachionus" var. "Spinosus", "Lecane inermis"), which are only present in warm waters. Jenő Ponyi has described the lake's primitive crustaceans in detail. Also a unique "Hydracarina acarus" is said to have found its habitat outside the fence surrounding the lake. The waters are reported to be beneficial to patients suffering from rheumatic diseases and locomotor disorders, among others. There is a thriving health tourism industry in the area. Lake Hévíz Lake Hévíz is located in Hévíz, Hungary, near the western end of Lake Balaton, from Keszthely. It is the largest thermal lake in the world,
Lake Lucerne Lake Lucerne Lake Lucerne (, literally "Lake of the Four Forested Settlements", , ) is a lake in central Switzerland and the fourth largest in the country. The lake has a complicated shape, with several sharp bends and four arms. It starts in the south-north bound Reuss Valley between steep cliffs above the "Urnersee" from Flüelen towards Brunnen to the north before it makes a sharp bend to the west where it continues into the "Gersauer Becken". Here is also the deepest point of the lake with . Even more west of it is the "Buochser Bucht", but the lake