Spas with private suites

Santa Barbara, California

A luxury Montecito resort spa reserved for overnight guests of the 38-cottage historic property in the Santa Barbara foothills.

Nha Trang, Khanh Hoa

A hotel spa at the boat-access-only Six Senses Ninh Van Bay resort near Nha Trang, open to overnight guests for treatments like bamboo massage and yoga.

Bora Bora

Overwater spa at the InterContinental Bora Bora Resort, with glass-floor treatment bungalows for massages and facials, hotel guests only.

Aachen, North Rhine-Westphalia

A suite hotel in central Aachen where each private room has its own jacuzzi and sauna, booked by the night rather than a day pass.

Sedona, Arizona

Hotel-only spa amenities at The Joy Sedona, a B&B and creekside cabin property near Uptown Sedona with outdoor hot tubs, a relaxation lounge and private suites.

Ibusuki, Kagoshima

A ryokan-style hotel in Ibusuki with source hot-spring baths, both shared and private, open only to overnight guests.

Chiang Mai, Northern Thailand

A hotel spa inside the Four Seasons Resort Chiang Mai in Mae Rim, with sauna, steam room, cold plunge and thermal pools set among rice paddies, open to resort

Penang

An adults-only villa resort spa near Kepala Batas, Penang, with 18 private villas, spa treatments and plant-based dining; reservation required.

Mykonos, South Aegean

Hotel spa at Omeon Mykonos in Agios Stefanos, open only to hotel guests, with private suites and sea-view treatment rooms geared toward couples.

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.