Kiskunmajsa in the south of Hungary. Here you can relax in 20 hectares of landscaped park, bathe in both clear and brown mineral waters, swim in the sandy-shored lake, strengthen your immune system in the sauna and jacuzzi, enjoy the four large water slides, and even play giant chess or mini golf—all for the unprincely day-pass price of HUF1500 (€6; $8).
There is accomodation on site, from basic motel-style digs for HUF8500 (€34; $45) for four people per night to luxury wooden cottages, priced around HUF17,000 (€68; $90) per cottage per night. Alternatively, you can find cheap bed and breakfast accomodation in the village itself, where you will be served hearty Hungarian food paired with some good regional wines.
In the village, you can also order a private open carriage ride to explore the surrounding countryside and see an unspoiled rural Hungary—even if the ride is a little bumpy! Check out the spa’s comprehensive Web site.
From Budapest, Kiskunmajsa can be reached by train in two to two and three-quarters hours, depending on train type.