Spas with reservation required

Krabi

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

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.

Ranong

A budget-friendly hot springs spot in Ranong, open daily 10am to 8pm, with walk-ins accepted though calling ahead is recommended.

Napa Valley, California

A hotel spa at the Napa Valley Marriott Resort, open to hotel guests by reservation, geared toward couples and families.

Da Nang

A day spa on Hoàng Kế Viêm in Ngũ Hành Sơn, Da Nang, open daily from 9am to midnight with moderate pricing.

Tucson, Arizona

A moderately priced day spa in Sabino Canyon Estates, Tucson, open daily from 8 a.m. to 11 p.m. with walk-ins welcome or reservations.

Hot Springs, Arkansas

A moderate-priced day spa in downtown Hot Springs open daily 9am to 10pm, offering massage services to adults only.

Hot Springs, Arkansas

A moderate-priced day spa at 328 Central Ave in Hot Springs National Park, open Tuesday through Saturday with hours that vary by day.

Pucón, Araucanía

Pangue SPA is an adults-only day spa in central Pucón, open daily 9am–9pm with moderate pricing and reservations advised.

Boulder, Colorado

Pure Serenity Spa is a moderate-priced day spa in Boulder open Sundays, with reservations recommended for couples or solo visits.

Palm Beach, Florida

A moderately priced day spa in West Palm Beach's Palm Beach Lakes area, open daily except Sunday from 9am to 10pm.

San Francisco, California

Day spa in San Francisco's Union Square, open daily 10am-8pm, moderate prices, walk-ins welcome but reservations required.

Georgetown, Texas

A medical spa in Georgetown, Texas, open weekdays from 10am to 6pm, with walk-ins welcome though reservations are required for treatments.

Sedona, Arizona

A moderately priced day spa in Sedona, Arizona, offering massage and spa treatments with walk-in and reservation options.

Ixtapan de la Sal, State of Mexico

A moderately priced day spa in the Santa Ana neighborhood of Ixtapan de la Sal, open daily and welcoming families.

Tucson, Arizona

Sakura Spa is a day spa in Tucson's Carriage Park, open daily from 9am to 10pm with moderate pricing.

Hudson, New York

A moderately priced day spa on NY-23B in Hudson, in the Catskills, taking walk-ins though reservations are recommended.

Tampere, Pirkanmaa

A budget-friendly public sauna and bathhouse in Tampere, open to walk-ins but reservations are also an option.

Scottsdale, Arizona

A moderate-priced day spa in South Scottsdale open Tuesday through Saturday afternoons, with reservations recommended.

Ixtapan de la Sal, State of Mexico

A moderately priced day spa in Ixtapan de la Sal open daily 9am–6pm, with walk-ins welcome but reservations required.

Sun Valley, Idaho

A family-owned medical spa in Ketchum, Idaho, offering skin and wellness treatments since 2008, with walk-ins welcome but reservations recommended.

Boston, Massachusetts

A downtown Boston day spa at 1 Devonshire Pl offering massage and wellness treatments for solo visitors and couples.

New York City, New York

Spa Meig is a day spa in Lower Manhattan on Worth Street, open every day from 10am to 9pm, with moderate pricing and both walk-in and reservation access.

Bad Blumau, Styria

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