Seniortech is right: the treaty signed by the Indians here a little over a century ago guaranteed perputual free use of the spring water here. There are two private bathing facilities, as well, which charge $10/day. The state bath house is free, but they run you out after 20 minutes (or so says their policy). If you go to the state house you can only go inside or outside during a given trip, not both, and the private baths where you could set your own temperature are now gone in favor of a single indoor and outdoor pool. (A single private room is maintained for handicap folk.) The Holiday Inn here does offer massages, though.