Hotel Czarny Potok Resort & SPA
Hotel SpaKrynica-Zdrój, Lesser Poland
Mountain resort spa in Krynica-Zdrój with indoor and outdoor pools, a sauna complex, and a clothing-optional 18+ zone; day passes available.
$$
Spas with hot tub
2 spas match
Spa Aiyana
Resort SpaCarmel-by-the-Sea, California
Resort spa at Carmel Valley Ranch with 12 treatment rooms, private terraces, a saltwater pool and infinity hot tub, open to adults by reservation.
$$$$