Palm Springs, California
Adults-only hot springs resort on Miracle Hill in Desert Hot Springs with private mineral tubs, a Finnish sauna, salt room and 35 spa treatments.
$$$
Spas with hydrotherapy circuit
4 spas match
Balian Springs
Day SpaWashington, D.C., District of Columbia
A multi-level day spa near DC with indoor and rooftop hydrotherapy pools, several sauna types, lounges, an a la carte spa menu and eateries.
$$Terme di Saturnia Spa & Golf Resort
Hot SpringsTuscany
A five-star resort in the Tuscan countryside built around a natural thermal spring, with day passes from €39 for outdoor thermal pools, hydromassage circuits
$Kimpton Grand Roatan Resort and Spa
Resort SpaWest Bay, Bay Islands Department
A beachfront resort spa on Roatán's West Bay Beach with a hydrotherapy circuit, thermal pool and ocean views, open only to hotel guests.
$$$$
