Spas with reservation required

Penang

An adults-only villa resort spa near Kepala Batas, Penang, with 18 private villas, spa treatments and plant-based dining; reservation required.

Rio de Janeiro

A Botafogo day spa offering relaxing and sports massage, a relaxation lounge, and gift vouchers, open daily with reservations recommended.

Carmel-by-the-Sea, California

A moderate-priced day spa in Carmel-by-the-Sea open daily 9am–9pm, serving solo travelers and couples.

Houston, Texas

A Montrose day spa in Houston open daily from 10am to 9pm, taking both walk-ins and reservations for adults.

Chicago, Illinois

Adults-only day spa in Chicago's Fulton Market District, with upscale pricing and both walk-in and reservation options.

Denver, Colorado

A Five Points day spa in Denver offering massage services, open Sundays around the clock, with walk-ins accepted though booking ahead is advised.

Miami, Florida

Adults-only hotel spa inside the Dua Hotel Miami, Autograph Collection, in Brickell, reservation required, hours and pricing not published.

Afyonkarahisar

A hotel thermal spa in Afyonkarahisar offering day passes by reservation, open daily 8am to 11pm, suited to families and couples.

Rome, Lazio

An Ayurveda-focused treatment studio in Rome's Ostiense area, open weekday afternoons and Saturday mornings by appointment only.

Boston, Massachusetts

A moderately priced day spa in Boston's Chinatown open daily from 10am to 11pm, taking both walk-ins and reservations.

Oak Creek, Wisconsin

A Oak Creek, WI massage clinic and day spa with adults-only access, listed hours only on Sunday, and a moderate price tier.

Djerba, Medenine

A day spa in Djerba Midun open daily 10am–8pm except Monday, welcoming both walk-ins and reservations.

Calistoga, California

Holistic Healing Day Spa is an adults-only day spa in Calistoga, California, accepting both walk-ins and reservations at a moderate price point.

Naples, Florida

A resort spa at the Hyatt Regency Coconut Point in Bonita Springs, open to hotel guests by reservation, with pool access on site.

Vail, Colorado

Adults-only day spa in Vail open Sundays, with both walk-ins and reservations accepted at its Frontage Road location.

Seminyak, Bali

A moderately priced day spa on Jl. Raya Seminyak open daily 10am to 9pm, suited to solo visits or couples.

Orlando, Florida

A small day spa in Southeast Orlando offering organic treatments by appointment, with walk-ins accepted when slots are open.

Quiberon, Brittany

A small adults-only day spa in Saint-Pierre-Quiberon, open by reservation Mondays and Tuesdays, with treatments priced in the moderate range.

The Hamptons, New York

A moderately priced day spa in Southampton that takes both walk-ins and reservations, open daily from 10am.

Miami, Florida

A medical spa in Brickell, Miami, open Tuesday through Saturday with reservations recommended for adults-only treatments.

Krabi

A moderately priced onsen-style day spa in Ao Nang, Krabi, open daily from late morning into the night.

Philadelphia, Pennsylvania

A reservation-only day spa in Blue Bell, just outside Philadelphia, with moderate pricing and adults-only access.

Calistoga, California

MoonAcre Spa & Baths is a day spa in Calistoga with a thermal pool, hot tub and sauna, open daily 9am–5pm and geared toward families and couples.

Marrakech, Marrakesh-Safi

An adults-only destination spa and wellness retreat on the Ourika road outside Marrakech, currently taking names for a waitlist.