Spas with reservation required

Berkshires, Massachusetts

A Great Barrington wellness studio focused on detox therapies like colon hydrotherapy, infrared sauna and liver flushes, by appointment only.

Hudson Valley, New York

An outdoor spa on the Hudson River in Kingston, NY, with two waterfront barrel saunas and garden massage cabins, reservation required.

Arima Onsen, Hyogo

Hotel spa in Arima Onsen with Arima's rare iron-rich "ginsen" waters, outdoor baths, sauna and jacuzzi, run as an all-inclusive overnight stay.

Boston, Massachusetts

A day spa on Lewis Wharf in Boston's North End, open daily 8am–9pm, geared toward adults and couples at moderate prices.

Çeşme, İzmir

A day spa in Çeşme's Dalyan district near Alaçatı, open daily 10am to 11pm, geared toward adults and couples with reservations required.

New York City, New York

A small Japanese-style bathhouse near Union Square with sauna, hot-tub onsen, cold plunge and a recovery lounge, open by reservation only.

Prague

A beer-spa and wellness venue in Prague's Nové Město district offering beer-bath tubs, massages, and a saunarium, open daily from 11am to 11pm.

Catskills, New York

A small day spa in West Hurley near Woodstock offering facials, massage, waxing and advanced skincare, founded by esthetician Debbie Dougan.

Taos, New Mexico

A boutique skin and body studio in Taos offering facials, lymphatic massage, Endermologie and head spa treatments by appointment.

Catskills, New York

A Catskills retreat center with a Tibetan-style spa offering sauna, steam, pools and cold plunge, built around overnight stays and group programs.

Sedona, Arizona

A 23-casita destination spa resort inside Sedona's Boynton Canyon, open to overnight hotel guests 16 and older for multi-day wellness journeys.

Lake Tahoe, California

Small day spa in Tahoe City offering massage, energy therapy and facials, plus an apothecary and gift shop, a few steps from the lake.

Kyle, Texas

A 88-acre Hill Country resort near Kyle and Wimberley with overnight rooms, a garden spa, pool, hot tubs and day-pass access by reservation.

Seattle, Washington

A downtown Seattle yoga studio with heated and unheated vinyasa, sculpt and hatha classes, plus a sauna, steam room and pools for after class.

Asheville, North Carolina

An overnight-stay forest retreat near Fairview with private cedar hot tubs and a shared sauna pavilion session, not a drop-in day spa.

Aguas Calientes, Cusco

A budget-friendly day spa in Aguas Calientes near Machu Picchu, open daily 8am-10pm for massages and treatments close to the train station.

Tulum, Quintana Roo

A hotel spa in Tulum's SM 15 area that requires advance reservations and is geared toward couples and small groups, priced in the upscale range.

Jackson Hole, Wyoming

A day spa in Jackson Hole offering massage and wellness treatments for solo visitors and couples, with reservations recommended.

Palm Springs, California

Andreas Hotel & Spa is a hotel spa in downtown Palm Springs with a relaxation lounge, open to hotel guests by reservation.

Penang

An adults-only villa resort spa near Kepala Batas, Penang, with 18 private villas, spa treatments and plant-based dining; reservation required.

Rio de Janeiro

A Botafogo day spa offering relaxing and sports massage, a relaxation lounge, and gift vouchers, open daily with reservations recommended.

Carmel-by-the-Sea, California

A moderate-priced day spa in Carmel-by-the-Sea open daily 9am–9pm, serving solo travelers and couples.

Chicago, Illinois

Adults-only day spa in Chicago's Fulton Market District, with upscale pricing and both walk-in and reservation options.

Denver, Colorado

A Five Points day spa in Denver offering massage services, open Sundays around the clock, with walk-ins accepted though booking ahead is advised.