Spas with reservation required

Bad Blumau, Styria

Rogner Bad Blumau is a Hundertwasser-designed thermal resort in Styria with geothermal pools, outdoor baths and hotel-guest-only access.

Medellín, Antioquia

A couples-focused day spa in El Poblado, Medellín, open daily 9am to 7pm with moderate pricing.

Kansas City, Missouri

A hotel spa inside the Westin Kansas City at Crown Center, open to hotel guests by reservation in downtown Kansas City.

Jackson Hole, Wyoming

Adults-only day spa inside the Teton Club in Teton Village, Jackson Hole, offering personalized treatments by reservation.

Yalova

A budget-friendly adults-only hammam in Yalova Merkez open daily from noon to midnight, with walk-ins accepted but reservations required.

Yufuin, Oita

A small hillside ryokan near Yufuin's town center where every room has its own half-open-air bath filled with 100% source hot-spring water and a view of Mt.

Tulum, Quintana Roo

Beachfront resort in Tulum pairing overnight stays with spa treatments, yoga and fitness classes, open to hotel guests only.

Ojai, California

A day spa on Mariano Drive in Ojai open evenings on weekdays and daytime on weekends, for solo visitors or couples.

Bodrum, Muğla

A hammam in Gümbet, Bodrum, open daily 10am-7pm for adults and couples, with both walk-in access and a reservation requirement, moderate pricing.

Houston, Texas

A women-owned day spa in South Central Houston offering massages, facials and laser treatments alongside a sauna and oxygen lounge.

Denver, Colorado

Private Russian banya spa in Denver's Cheesman Park offering banya sessions, massage and body treatments by appointment since 1995.

San Diego, California

East Village day spa specializing in Thai massage, with scrubs, hot stone and coconut soak add-ons, open daily with walk-ins accepted.

New York City, New York

Bowery massage and foot reflexology spot in Manhattan open daily 10am to midnight, walk-ins welcome, since 2012.

Big Sur, California

Adults-only hotel spa at Ventana Big Sur with ocean-view treatment rooms, outdoor cabanas for couples, and a 24-hour fitness and yoga space.

Charleston, South Carolina

A full-service day spa on Charleston's King Street offering massage, facials, hair, nails and makeup by reservation only.

Orlando, Florida

A medical spa in Orlando's SoDo district offering injectables, fillers, microneedling and facials, with walk-ins accepted alongside appointments.

Philadelphia, Pennsylvania

A private-reservation spa in Philadelphia's Manayunk neighborhood for date nights, birthday and bachelorette parties, with hot tub, sauna and massage chairs

Atlanta, Georgia

Adults-only day spa in Midtown Atlanta with a relaxation lounge, open daily by reservation at moderate prices.

San Diego, California

A budget massage studio in San Diego's City Heights area, open daily from 9am to 11pm for walk-in or booked sessions.

Santa Barbara, California

A moderately priced, adults-only day spa in Santa Barbara open daily except Sunday, with walk-ins welcome though reservations are recommended.

Miami, Florida

Recovery and longevity studio in Brickell offering sauna, cold plunge, cryotherapy and IV therapy, bookable by reservation or walk-in.

Hot Springs, Arkansas

A moderately priced day spa in Hot Springs Village, Arkansas, open weekdays for adults and couples, with reservations recommended.

Ojai, California

A medical spa in downtown Ojai offering Botox, dermal fillers, laser treatments and facials by consultation.

Chicago, Illinois

A hotel spa for Waldorf Astoria guests only in Chicago's Rush & Division area, open daily 6am-9pm by reservation, luxury pricing.