Spas with rooftop

Saratoga Springs, New York

A floating Nordic-style sauna moored on Saratoga Lake, with a 15-person cabin, roof terrace and lake plunge, open daily except Monday.

San Pedro de Atacama, Antofagasta

A hotel spa inside the luxury Tierra Atacama lodge near San Pedro de Atacama, with indoor and infinity pools, sauna, steam room and treatment rooms, open only

Nashville, Tennessee

Hotel spa inside the Four Seasons in downtown Nashville's SoBro district, open to hotel guests, with a rooftop pool over the Cumberland River.