in my country there are thermal waters that are fantastic, their temperature allows that the bath is pleasant at any time, I went with my family some years ago and I still remember it, there was only a slight smell of sulfur but nothing that would overshadow the visit, also take advantage of using the clay present in the thermal waters, they say it is good and curative! so I hope you enjoy your stay!
Sometimes we don't need 5-star hotels to be in harmony.