Spas with adults only

Santa Fe, New Mexico

Hotel spa at the Eldorado in downtown Santa Fe offering massage and bodywork treatments; appointments required, no day pass.

Calistoga, California

A Calistoga day spa on Lincoln Avenue specializing in lymphatic bodywork and facial treatments, with a relaxation lounge for adults and solo travelers.

Denver, Colorado

A reservation-only massage studio in Denver's Five Points neighborhood, run by a licensed therapist with a relaxation lounge and no same-day bookings.

Park City, Utah

A Park City studio pairing private infrared sauna cabins with float therapy tanks, booked by reservation, with membership options for regulars.

San Francisco, California

Upscale day spa on Union Street in San Francisco's Cow Hollow, offering around 20 facial and massage treatments, including a signature Quadruple Lift Facial.

Ojai, California

A small Ojai day spa run by one certified therapist specializing in lymphatic drainage therapy, by reservation.

Elkridge, Maryland

A halotherapy day spa in West Elkridge, near Baltimore, built around a salt cave, massage rooms and a yoga studio, aimed at solo adult visitors.

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.

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.

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.

Los Angeles, California

A boutique medical spa in Pico-Robertson focused entirely on facials, from HydraFacial to microdermabrasion, with no body treatments on the menu.

New York City, New York

A no-frills medical spa in Manhattan built around lymphatic drainage therapy and acupuncture, open daily 10am to 9:30pm.

Carmel, Indiana

A no-frills contrast therapy studio in Carmel, Indiana, built around a 30-minute sauna-and-cold-plunge circuit for solo visitors.

Naples, Florida

Medical spa in North Naples focused on injectables, facials, peels and skin-resurfacing treatments like Morpheus and Votiva.

Ubud, Bali

An adults-only wellness retreat on Ubud's Ayung River offering multi-day healing programmes, thermal circuits and plant-based cuisine by reservation only.

Tokyo

Private-room head spa salon in Minami-Aoyama, Omotesando, offering 90- to 210-minute scalp treatments from roughly ¥24,750.

Ojai, California

A small facial studio in Ojai run by esthetician Allison, offering customized facials, RF skin tightening, microcurrent and waxing by reservation.

Zurich

An upscale day spa near Paradeplatz in central Zurich focused on facials, anti-aging treatments and massages for adults.

Las Vegas, Nevada

A budget-friendly medical and day spa in Las Vegas offering massage and HydraFacial treatments, open daily 10am–7pm with walk-ins accepted.

Santa Barbara, California

A medical spa on State Street in Santa Barbara offering Botox, fillers, laser hair removal and HydraFacials under physician oversight.

San Diego, California

A Clairemont wellness studio in San Diego pairing acupuncture and bodywork with an infrared sauna and a Himalayan salt room for classes.

Miami, Florida

A Brickell medical spa running 18 categories of non-invasive aesthetic treatments, including Botox, fillers and a signature facial, weekdays only.

Nashville, Tennessee

A moderate-priced day spa in Nashville's Edgehill neighborhood offering 8 facial-focused treatments, open daily with evening hours on weekdays.