Spas with reservation required

San Francisco, California

A day spa on Union Street in San Francisco offering body wraps, facials and massage, including couples massage, with walk-ins accepted when space allows.

San Francisco, California

Valencia Street studio in Dolores Heights focused on lymphatic body sculpting and facials, including its signature Face Sculpt.

Naples, Florida

A small, moderately priced day spa in East Naples offering massage and a sauna, open daily with walk-ins accepted.

Asheville, North Carolina

A Japanese-inspired destination spa on a mountainside outside downtown Asheville, built around private outdoor salt hydrotherapy tubs and massage.

Sierraville, California

A non-profit hot springs retreat near Lake Tahoe with natural spring pools, reservation-only day and evening soaks, camping and rooms, closed Mondays and

Carmel-by-the-Sea, California

Upscale day spa in Carmel-by-the-Sea's Golden Rectangle with sauna, steam, cold plunge and thermal pools, open daily from 6:30am.

Kyoto

Hotel spa in Kyoto's Higashiyama Ward with a day pass for pool, bathhouse, sauna and gym, plus treatment suites and couples options.

Asheville, North Carolina

A boutique day spa inside Haywood Park Hotel in downtown Asheville, offering facials, massage and couples treatments with free valet parking.

Denver, Colorado

A three-room day spa in Five Points offering massage, facials and head spa treatments, reservation only, with a signature 80-minute massage-facial combo.

Charleston, South Carolina

A moderately priced day spa in North Charleston offering massage, facials, body treatments and couples packages, no day pass.

Mumbai, Maharashtra

An upscale Ayurvedic retreat in Vile Parle West, Mumbai, with five treatments, couples rooms and a relaxation lounge; reservations required, open daily

Sopot, Pomerania

A medical resort spa in Sopot built around local brine and mud treatments, open to hotel guests by reservation rather than day visitors.

Santa Barbara, California

A downtown Santa Barbara day spa built around a private infrared sauna, salt room, cold plunge and a sound-and-light meditation pod, booked by appointment.

Phuket

A compact day spa on Thalang Road in Phuket Old Town offering rose-petal jacuzzi baths and coconut milk soaks, geared toward couples, open daily 10am–11pm.

Austin, Texas

Adults-only hotel spa at the Fairmont Austin with nine treatment rooms, a hydrotherapy circuit, sauna and cold plunge, open daily with day passes available.

Miami, Florida

A small treatment-focused day spa in South of Fifth, Miami Beach, offering massages, facials and body scrubs with walk-in slots available.

Dallas, Texas

Hotel spa inside The Adolphus in downtown Dallas, with six treatment rooms, a couple's suite and a 22-item menu of massages, facials and body treatments.

Carmel-by-the-Sea, California

Resort spa at Carmel Valley Ranch with 12 treatment rooms, private terraces, a saltwater pool and infinity hot tub, open to adults by reservation.

San Diego, California

Adults-only day spa at Mission Bay Resort with massage, facials, Himalayan salt treatments and couples suites; walk-ins and day passes welcome.

Santa Barbara, California

A small downtown Santa Barbara day spa off State Street offering waxing, facials, massage and skin treatments, with online booking required.

Lake Tahoe, California

Adults-only hotel spa at Edgewood Tahoe with gemstone massage rituals, an oxygen bar, and treatment-only access to the facility.

Palm Springs, California

Hotel spa at the Renaissance Esmeralda in Indian Wells offering desert-inspired treatments, a recovery lounge, steam rooms and day passes, adults only.

Nashville, Tennessee

A Berry Hill day spa in Nashville offering massage, facials, body treatments and a sauna pod/salt room, open Tuesday through Saturday.

Frisco, Texas

Frisco day spa offering massage, facials, body treatments and infrared sauna, with a $179.90 couple's massage as its signature service.