H2O Hotel-Therme-Resort

H2O Hotel-Therme-Resort is located in Bad Waltersdorf, Styria, Austria, drawing its thermal water from the region’s own deep groundwater sources. The architecture centers on a massive indoor sun dome that houses over 1,100 square meters of water park space, creating a bright, tropical atmosphere regardless of the weather outside. The thermal water emerges at a comfortable temperature that feeds the resort’s many pools, making it a year-round destination for families in the heart of the Steiermark thermal region.

The signature facility is the Lazy River, which circles through the main hall and leads guests to the central Edelstein-Whirlpool. You’ll also find a wave pool with Acapulco Beach that activates every hour, the 101-meter “Blauer Blitz” slide for single or double riders, and the 118-meter “Speedy” slide with integrated light effects. For younger children, the HopiHo Wasserspielgarten offers a dedicated play area with a small slide, while adults can relax at the pool bar or in the outdoor Erlebnisbecken with massage jets and champagne loungers. The wellness philosophy here is purely about family fun and active water play — guests come for the variety of pools, the slides, and the sense that there’s always something different to try.

This resort is best suited for families with children of all ages, from babies in the Babypool to teenagers racing down the slides and adults swimming laps in the 32°C Olympia Sportbecken. A full day is ideal to experience all 10 pools, the outdoor area, and the three slides without rushing. What makes H2O different from other Austrian thermal spas is its sheer density of water attractions under one roof — the combination of a lazy river, wave pool, multiple slides, and a dedicated children’s water playground means you rarely have to wait for anything, and the kids are never bored.