Spas with adults only in Slovenia

Rogaška Slatina, Savinjska

Wellness center at Grand Hotel Rogaška in Rogaška Slatina, Slovenia, with pools, saunas and fitness; day pass available by reservation.

Brežice, Posavje

A large thermal water park in Brežice, Slovenia, with a year-round indoor pool riviera, an adults-only sauna zone, and seasonal outdoor slides.

Rogaška Slatina, Savinjska

Ayurvedic treatment center in Celje offering massage and medical-spa therapies, open weekdays 9am to 9pm and closed weekends.