Spas with reservation required

Djerba, Medenine

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

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.

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.

Napa Valley, California

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

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.

Tampere, Pirkanmaa

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

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.

Bad Blumau, Styria

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

Kansas City, Missouri

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

Boston, Massachusetts

Season Four Spa is a small Back Bay day spa offering Swedish, deep tissue and hot stone bodywork plus foot reflexology, open daily 9am-9pm with walk-ins