Spas with reservation required

Sonoma, California

Hotel spa at The Lodge at Sonoma with an outdoor terrace, soaking pool, plunge pool and barrel sauna, open daily 9am-5pm, adults-only, reservation required.

Asheville, North Carolina

A day spa in a converted barn on Horse Shoe Farm near Asheville, offering massage and body treatments amid farm and mountain surroundings.

Napa Valley, California

A single-treatment float spa in Napa offering sensory-deprivation float pods with Epsom salt water, plus dedicated parking and walk-in access.

Salalah, Dhofar

A ground-floor massage and spa center inside the Kyriad Hotel in Salalah, open daily from 10am to 1am with six treatment options.

New Delhi, Delhi

Day spa in Defence Colony, New Delhi offering Balinese, aromatherapy and Swedish massages from Rs. 3000, open daily 9am–11pm.

Vail, Colorado

Medical spa in Eagle-Vail combining acupuncture, massage, facials and detox tech like infrared sauna and red light therapy, by appointment.

Washington, D.C., District of Columbia

Dupont Circle medical spa offering Botox, Sculptra, IV therapy, laser and skin treatments, with complimentary consultations and walk-in availability.

Dallas, Texas

A medical spa on Lovers Lane in Bluffview offering injectables, laser treatments, and skin tightening by reservation, no day passes.

Springboro, Ohio

A wellness center in Springboro, Ohio built around a natural salt cave, with energy healing, sound baths and metaphysical classes for individuals or groups.

Portland, Oregon

Adults-only day spa in Portland's Hosford-Abernethy neighborhood offering facial treatments by appointment in private suites, no walk-ins or day passes.

Fez, Fès-Meknès

Family-run hammam and day spa in Fez's Ville Nouvelle offering traditional scrub-and-massage packages, a jacuzzi, sauna and à la carte beauty treatments.

Dublin, Leinster

An outdoor barrel sauna and cold plunge pool setup in Saggart, Dublin, booked in 50-minute sessions for groups and couples.

Cotswolds, England

A wood-fired riverside sauna at Whichford Mill in the Cotswolds, with a cold-plunge bath, river dipping, and both private and communal sessions.

Naples, Florida

A one-on-one day spa inside Salon by JC on 5th Avenue South in Old Naples, offering facials, massages and body treatments by appointment.

New York City, New York

Thermal bath circuit and massages in a restored 1883 Tribeca textile factory, with a skylit tepidarium and candlelit thermal pools; reservation required.

Orlando, Florida

Day spa near Lake Eola in downtown Orlando offering massage, facials, body treatments and a couples room, open daily 9am-9pm.

Coorg, Karnataka

Riverside resort spa in Coorg with private bungalows, a pool, and spa treatments along the Kaveri River; booking required.

Seattle, Washington

Full-service day spa in South Lake Union offering massage, facials and a dry sauna, located inside LEVEL Seattle on Fairview Avenue North.

San Diego, California

A Korean-style day spa on Convoy Street in Kearny Mesa offering sauna access, body scrubs and massage, open daily 8:30am to 9pm.

Rishikesh, Uttarakhand

An upscale riverside resort 18 km outside Rishikesh with an in-house spa, yoga studio and restaurant, open only to overnight guests by reservation.

Boston, Massachusetts

A Moroccan-style hammam on Route 1 in Peabody offering steam, sauna and exfoliation treatments for adults and couples, reservation only.

Miami, Florida

A family-run day spa in Miami's West Flagler area offering facials, body treatments and massage, with a popular facial-plus-massage combo package.

Rogaška Slatina, Savinjska

Ayurvedic treatment center in Celje offering massage and medical-spa therapies, open weekdays 9am to 9pm and closed weekends.

San Diego, California

A day spa in University City, San Diego, open since the late 1990s, offering facials, massage and lymphatic drainage with a monthly membership option.