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,
Balaton Sound sets new attendance records yearly. The first Balaton Sound festival was held between 12 July and 15 July 2007. The fact that the event was held on the shore of the largest lake in Central Europe in mid-summer, its twenty-hour music schedule, and the line-up gained it significant public interest. The festival is located on the west part of Zamárdi at the crossing of Panoráma and Zöldfa utca (street). Inside the festival area variable stages, lounges, and tents are established for the performances.The sponsors of the festival create luxurious chill-out facilities with hammocks, bean bags, easy chairs. Visitors to Balaton