Located in southeastern Slovenia near the town of Brežice, one of the country's major centres of wine production, Terme Čatež is Slovenia's largest wellness, business and recreational centre, featuring one of the country's most impressive water parks, which includes over 12,000 square metres of water surface area of indoor and outdoor thermal pools and attractions. Many special holiday packages are available during the summer, with significant family discounts. Check their website for lots more info.