Spas with reservation required

The Hamptons, New York

A moderate-priced day spa in Mattituck on the North Fork, open daily except Sunday, with walk-ins accepted but reservations recommended.

Sonoma, California

Upscale day spa in Sonoma offering facials, bodywork, Endermologie and sound healing, with a relaxation lounge and membership option.

Palm Springs, California

Adults-only day spa in downtown Palm Springs, open daily 9am to 6pm, with moderate pricing and both walk-in and reservation options.

Miami, Florida

Upscale day spa in Downtown Miami offering massage, facials, laser hair removal and a relaxation lounge, open Tuesday through Saturday.

Sonoma, California

A one-table day spa above a Glen Ellen storefront offering private massage and organic facial treatments by appointment only.

Lake Tahoe, California

A South Lake Tahoe day spa focused on body, combo and foot massage, open daily with reservations required.

Washington, D.C., District of Columbia

A moderately priced day spa in Northwest Washington, D.C., open daily with both walk-in and reservation options for adults and couples.

Catskills, New York

A day spa in Liberty, New York, offering treatments for solo visitors and couples with walk-in and reservation options.

Ojai, California

A small, adults-only day spa in Ojai offering nature-based treatments by appointment, moderately priced, closed Tuesdays.

San Francisco, California

A moderate-priced day spa just off 24th Street in Noe Valley offering massage, facials, nail care, lash/brow work and waxing, with a relaxation lounge before

Los Angeles, California

A hotel spa at the Conrad Los Angeles in Downtown LA, open only to hotel guests by reservation, with an adults-only, couples-friendly setting.

Vail, Colorado

A locally owned massage studio inside The Wren in Vail offering full-length therapeutic sessions, from craniosacral therapy to Thai massage and cupping.

Jacksonville, Florida

Medical spa in Northside Jacksonville offering facials, body contouring and VelaShape treatments, open daily except Sunday with reservations recommended.

Miami, Florida

A medical spa in Brickell's Latitude One building offering Botox, IPL photofacials, body contouring and massage by appointment.

Napa Valley, California

A medical spa in downtown Napa offering facials, injectables and nonsurgical body contouring, formerly Lift Aesthetics, now under the Destination Aesthetics

Scottsdale, Arizona

A reservation-only medical spa in South Scottsdale's Old Town area focused on non-invasive red light skin rejuvenation treatments.

Houston, Texas

Vietnamese-style head spa in Houston's Alief district offering scalp massage, hair washing and facial treatments, open daily.

Santa Fe, New Mexico

A moderate-priced day spa in Santa Fe offering therapeutic massage, open most days except Tuesday and Wednesday.

Palm Beach, Florida

A Palm Beach Gardens day spa offering massage, reflexology, facials and acupuncture, open daily 10am-9pm with walk-ins welcome.

Dallas, Texas

A medical-leaning day spa in Vickery Meadow, Dallas, focused on facials and body-contouring treatments like ultrasonic cavitation.

Boca Raton, Florida

A day spa in downtown Boca Raton open daily 9am-8:15pm, offering facials, massage, body treatments and nail services since 1996.

Valle de Bravo, State of Mexico

An adults-only luxury wellness retreat on the shore of Lake Avándaro in Valle de Bravo, built into a rock formation and run by reservation only.

Charleston, South Carolina

A reservation-only day spa in Charleston's French Quarter offering massage, skincare and sugaring in a quiet, adults-only setting.

Byron Bay, New South Wales

Hotel day spa at Crystalbrook Byron offering customizable massages and facials, open daily with Sunday by appointment only.