Spas with reservation required

Dublin, Leinster

An outdoor barrel sauna and cold plunge pool setup in Saggart, Dublin, booked in 50-minute sessions for groups and couples.

Cotswolds, England

A wood-fired riverside sauna at Whichford Mill in the Cotswolds, with a cold-plunge bath, river dipping, and both private and communal sessions.

Los Angeles, California

A West LA day spa focused on scalp treatments, facials and massage, with walk-ins welcome most days from 10 or 11am to 8pm.

New York City, New York

Thermal bath circuit and massages in a restored 1883 Tribeca textile factory, with a skylit tepidarium and candlelit thermal pools; reservation required.

Orlando, Florida

Day spa near Lake Eola in downtown Orlando offering massage, facials, body treatments and a couples room, open daily 9am-9pm.

Coorg, Karnataka

Riverside resort spa in Coorg with private bungalows, a pool, and spa treatments along the Kaveri River; booking required.

San Diego, California

A Korean-style day spa on Convoy Street in Kearny Mesa offering sauna access, body scrubs and massage, open daily 8:30am to 9pm.

Carmel-by-the-Sea, California

A moderate-priced day spa on 5th Avenue in Carmel-by-the-Sea, open daily with walk-ins accepted though reservations are recommended.

San Diego, California

Full-service day spa on the 3rd floor of AquaVie Fitness + Wellness Club in downtown San Diego, offering massage, facials and multi-step body rituals by

Rishikesh, Uttarakhand

An upscale riverside resort 18 km outside Rishikesh with an in-house spa, yoga studio and restaurant, open only to overnight guests by reservation.

Boston, Massachusetts

A Moroccan-style hammam on Route 1 in Peabody offering steam, sauna and exfoliation treatments for adults and couples, reservation only.

Miami, Florida

A family-run day spa in Miami's West Flagler area offering facials, body treatments and massage, with a popular facial-plus-massage combo package.

Los Angeles, California

A Larchmont day spa in Los Angeles focused on massage, with Thai, Swedish, deep tissue and hot stone treatments, open daily 10am-9pm.

Lake Tahoe, California

Day spa in Truckee near Lake Tahoe offering massages, facials, body wraps and Thai poultice treatments, open daily with reservations.

San Diego, California

A day spa in University City, San Diego, open since the late 1990s, offering facials, massage and lymphatic drainage with a monthly membership option.

Lake Tahoe, California

A South Lake Tahoe day spa offering massage, facials and body treatments including couples sessions, open daily except Monday.

Los Angeles, California

A boutique medical spa in Pico-Robertson focused entirely on facials, from HydraFacial to microdermabrasion, with no body treatments on the menu.

Los Angeles, California

A walk-in-friendly neighborhood day spa on Highland Ave in Hollywood offering massages and facials at budget-friendly rates.

Las Vegas, Nevada

A moderately priced day spa in a Lone Mountain strip mall in Las Vegas, offering massage and couples treatments by reservation.

Naples, Florida

Sole-practitioner day spa in Naples, FL offering massage, cupping, facials and a plumbed Japanese-style head spa, with private treatment suites.

Los Angeles, California

A day spa on La Brea Avenue near the Fairfax area of Los Angeles offering massages, facials and hydrotherapy, with reservations recommended.

Catskills, New York

A small storefront in Catskill, NY offering whole-body cryotherapy, infrared sauna and red light therapy sessions, open most days except Tuesday and Wednesday.

New York City, New York

A no-frills medical spa in Manhattan built around lymphatic drainage therapy and acupuncture, open daily 10am to 9:30pm.

Santa Barbara, California

A small boutique day spa on State Street in Santa Barbara offering facials, massages and body treatments by appointment, seven days a week.