Spa-complex of Hajdúszoboszló
The Hungarospa Hajdúszoboszló is the biggest Spa-complex of Europe, offers the following the services: Thermal Spa, Aqua Palace Adventure, Aquapark, Open-air spa, Indoor swimming pool, Thermal Camping. Several programms in winter and in sommer!

Deteils here: http://www.hungarospa.hu/en/Bathing-complex