Spas with reservation required

Mexico City, Ciudad de México

An adults-only day spa for couples on Paseo de la Reforma in Cuauhtémoc, Mexico City, open daily from 9am to 8pm.

Scottsdale, Arizona

A skincare-focused day spa in South Scottsdale offering facials and treatments using SkinBetter and GlyMed product lines, open weekdays by appointment.

Chicago, Illinois

A Gold Coast medical and day spa combining massage, facials, laser and injectables with a robe-and-locker relaxation lounge, open daily except Tuesday and

Tepoztlán, Morelos

A day spa and temazcal (traditional Mexican sweat lodge) in Tepoztlán, Morelos, open Wednesday through Sunday with reservations suggested.

Tucson, Arizona

A Japanese-style head spa in a Tucson medical plaza, offering scalp treatments and massage with walk-ins or booked appointments.

Boston, Massachusetts

A moderately priced day spa for adults in Boston's South End, open daily with both walk-in and reservation options.

Park City, Utah

Hotel spa at Mayflower Mountain near Deer Valley with massages, facials, a sauna, relaxation lounge and couples treatments; reservations required.

Houston, Texas

A hotel spa inside The Laura Hotel in downtown Houston offering massage, facial and nail treatments for solo visitors, couples and groups.

Berkshires, Massachusetts

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

Park City, Utah

A medical spa in Park City offering injectables, aesthetics, body treatments and skincare by appointment only, no day passes.

Tucson, Arizona

Adults-only day spa in Tucson's Triangle area offering lymphatic facials, dermaplaning and a hydrotherapy circuit; reservations required.

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.

Vichy, Auvergne-Rhône-Alpes

A Vichy thermal spa offering medically prescribed 18-day cures for digestion and joint pain, plus shorter day-pass wellness sessions using mineral-rich local

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.

Lima

A Korean-style spa in Surco, Lima, open daily except Sunday, adults only, with walk-ins welcome but reservations recommended.

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.