Spa tourism has long been a mainstay of the Slovak tourism industry. A combination of geothermal sources and fine-quality mineral water means that the country has several spa towns. The most prestigious, Piešťany, is about an hour north of Bratislava. More recently, aquaparks with slides, hotpools and wave machines have grown up not far from the capital. The closest aquaparks are in Senec, Veľký Meder and Galanta.