Spas with reservation required

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.

Seattle, Washington

Full-service day spa in South Lake Union offering massage, facials and a dry sauna, located inside LEVEL Seattle on Fairview Avenue North.

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.

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.

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.

Rogaška Slatina, Savinjska

Ayurvedic treatment center in Celje offering massage and medical-spa therapies, open weekdays 9am to 9pm and closed weekends.

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.

Los Angeles, California

Day spa in a Montebello strip mall plaza offering facials, massages and body treatments, open daily with walk-ins accepted.

Vail, Colorado

Medical spa in Vail offering facials, skin therapies, IV drips and sports recovery treatments, with walk-ins welcome but reservations recommended.

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.

Naples, Florida

A Naples medical spa in Park Shore focused on skin treatments like Morpheus8 microneedling and Lumecca IPL, with reservations required.

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.

Zanzibar

A moderate-priced day spa and hammam in Stone Town offering over 50 treatments, including Ayurvedic therapies and a sauna.