Spas with reservation required

San Francisco, California

A Japantown bathhouse open for 50+ years, with a Japanese-style thermal pool and relaxation lounge, reservation required, adults only.

Austin, Texas

Adults-only resort spa on Lake Austin offering all-inclusive overnight stays and limited day passes to pools, saunas, steam rooms and lake activities.

San Diego, California

A reservation-only day spa in San Diego's Core-Columbia neighborhood offering couples treatments and a relaxation lounge at moderate prices.

Koh Samui, Surat Thani

A day spa in Bo Phut, Koh Samui, open daily 9am to 11pm with a sauna and traditional Thai treatments for solo visitors and couples.

Lake Tahoe, California

Lakeside day spa in Tahoe City offering massage and Dermalogica facials, open daily 9am-7pm, operating for 35 years.

Mumbai, Maharashtra

An Ayurveda-based day spa on Marine Drive in Mumbai offering massage, detox and beauty therapies with a relaxation lounge and yoga space.

Minneapolis, Minnesota

A Northeast Minneapolis wellness studio rooted in Traditional Chinese Medicine, offering sauna access by reservation in the Bottineau neighborhood.

Piešťany, Trnava Region

A head spa in Piešťany offering scalp treatments, head/neck/shoulder massage and shampoo rituals in sessions from 45 to 120 minutes.

New York City, New York

A Manhattan day spa at 1 Park Ave offering massages, facials and hydrotherapy, with a relaxation lounge and both walk-in and reservation options.

Dobbs Ferry, New York

A Dobbs Ferry day spa with a hydrotherapy circuit, relaxation lounge, massages and facials, open daily with reservations recommended.

Ojai, California

A small, independently owned day spa in Ojai offering facials, massage, head spa treatments, infrared sauna and salt therapy.

Park City, Utah

A sauna-and-cold-plunge day spa in Park City with memberships, private group buyouts, and reservation-only access.

Boston, Massachusetts

A boutique day spa and salon in Charlestown, Boston, offering moderate-priced treatments with a relaxation lounge and mixed walk-in/appointment access.

French Riviera, Provence-Alpes-Côte d'Azur

An Ayurvedic day spa inside Nehô Suites Cannes Croisette offering treatments, consultations and Panchakarma retreats by appointment, open daily 10am–8pm.

Des Peres, Missouri

A moderate-priced day spa in Des Peres, just west of St. Louis, open six days a week with a relaxation lounge and treatments geared toward couples and adults.

Nashville, Tennessee

A Gulch studio for infrared sauna and cold plunge sessions in private suites, open daily with reservations required.

Los Angeles, California

A wellness retreat in Westlake's Wilshire corridor offering cold plunge, sauna and movement classes, built around group and community sessions.

Aachen, North Rhine-Westphalia

Adults-only day spa in Aachen with a hydrotherapy circuit and relaxation lounge, open daily 10am–9pm, upscale pricing.

San Francisco, California

A Traditional Chinese Medicine spa in Pacific Heights offering acupuncture-rooted treatments and botanical skincare, open daily 9am-9pm.

San Francisco, California

Redmint on Union Street is a Traditional Chinese Medicine wellness and beauty spa in San Francisco, open daily 9am to 9pm.

The Hamptons, New York

Adults-only destination spa and 12-room retreat in Water Mill, offering hydrotherapy, yoga, spa treatments and overnight stays by reservation.

Berkshires, Massachusetts

A solo-focused skincare studio in Lenox offering one-on-one facial treatments with natural, eco-conscious products by appointment.

Houston, Texas

A moderate-priced day spa on the 23rd floor of a downtown Houston office tower, open Wednesday through Sunday with a relaxation lounge and sauna.

The Hamptons, New York

Day spa on Montauk Highway in East Hampton offering facials, massage, nails and waxing, open daily 9am–6pm since 2003.