Do a few lengths of the pool or just cool down in the water at Lake Sosto Park. There's plenty of fun here for all ages.
There's an admission fee to visit this aquatic and recreational facility, which is located in Sóstógyógyfürdő. But there's plenty more to see around these parts than just Lake Sosto Park. Nyiregyhaza Zoo, Open Air Village Museum and Sóstó Museum Village are also worth checking out.