I didn't come equipped for adventure on this trip, so my excursions have tended to lie on the mild side.
Kinder unter drei Jahren dürfen nicht in die Therme.
Plenty of touring companies offer all kinds of themed excursions from the city, suiting everyone from adventurers to couch potatoes.
However, when I left after about two hours of bathing, the line to get in was out the door, it didn't appear to be moving, and more buses were arriving all the time.