Spas with reservation required in United States

San Diego, California

Grantville day spa in San Diego pairing scalp/head spa treatments with Thai and other massage styles, open daily with walk-ins accepted.

Lake Tahoe, California

A massage-and-facial day spa in South Lake Tahoe's Heavenly Village, open daily 10am-9pm, with couples treatments and a signature package at $320.

Las Vegas, Nevada

Adults-only hotel spa inside Westgate Las Vegas offering massages, facials, salon services, sauna, steam room and a thermal pool, open daily 9am-6pm.

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.

Asheville, North Carolina

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

Boston, Massachusetts

A Newbury Street medical spa for injectables, laser hair removal, microneedling and facials, with massage also on the menu, by appointment only.

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.

Seattle, Washington

A reservation-only social wellness sauna spa in Renton (serving the Seattle area) with a thermal pool, cold plunge, sauna and steam room, day passes from $75.

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.

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.