Spas with upscale

San Diego, California

A hotel spa on Mission Bay in San Diego with sauna, steam room, cold plunge and thermal pools, open only to resort guests.

Opelika, Alabama

A hotel spa inside the Auburn Marriott Opelika Resort on the Robert Trent Jones Trail golf course, open to hotel guests.

Adairsville, Georgia

A resort spa at Barnsley Resort in Adairsville, Georgia, offering massage, facials, reflexology, sauna and steam room, open to hotel guests only.

The Hamptons, New York

A 29-room boutique hotel in Southampton with a poolside bathing club, relaxation lounge and restaurant, open to hotel guests only.

Scottsdale, Arizona

A hotel spa at the 65-acre Fairmont Scottsdale Princess resort in North Scottsdale, open to overnight guests with sauna, steam room and pool access.

Fort Lauderdale, Florida

A hotel spa at the Fort Lauderdale Marriott Harbor Beach Resort, open to hotel guests, with ocean views, a relaxation lounge and an on-site restaurant.

Sint Eustatius

A 40-acre dive-and-stay resort on Sint Eustatius with a pool, restaurant and shuttle service to its dive center, open only to overnight guests.

Napa Valley, California

Spa Terra is the cave-set spa at Meritage Resort in Napa Valley, open to hotel guests with pools, a relaxation lounge and on-site dining nearby.

Scarborough

A boutique hillside hotel above Bacolet Bay in Scarborough, Tobago, with an infinity pool and ocean views, built around a converted 150-year-old Donkey Cart

Santa Barbara, California

A hotel spa inside Hotel Californian in Lower State, Santa Barbara, with a thermal pool and relaxation lounge, open to hotel guests only.

San Juan Capistrano, California

A hotel spa at the Autograph Collection's Inn at the Mission in San Juan Capistrano, open to overnight guests with a relaxation lounge on site.

Portsmouth, Saint John Parish

A hotel spa inside the InterContinental Dominica Cabrits Resort, open to overnight guests staying within Cabrits National Park near Portsmouth.

New Orleans, Louisiana

A hotel spa at the InterContinental New Orleans in the Central Business District, open to hotel guests only, with a relaxation lounge aimed at couples.

Cancún, Quintana Roo

A hotel spa at InterContinental Presidente Cancun Resort in Punta Cancun, open to hotel guests only, with an upscale price tier.

Scottsdale, Arizona

A resort spa at JW Marriott Phoenix Desert Ridge with a thermal pool, relaxation lounge and on-site café, open to hotel guests and day-pass visitors.

Austin, Texas

A lakeside resort spa on Lake Travis in Lakeway, Texas, with pools, outdoor baths and treatments, open only to hotel guests.

Palm Springs, California

A hotel spa at Palm Springs' Riviera Resort & Spa, open only to overnight guests and paired with a pool, restaurant and bar.

Puerto Vallarta, Jalisco

An all-inclusive family resort on Puerto Vallarta's hotel-zone beach, with a spa (opening soon) offering massages, facials and other treatments for guests only.

St. Andrews, New Brunswick

A hotel spa at The Algonquin Resort in St. Andrews, New Brunswick, offering ocean-view relaxation space with day-pass access for non-guests.

Fort Lauderdale, Florida

Hotel spa inside The Dalmar in central Fort Lauderdale, open to hotel guests with a reservation and a relaxation lounge on site.

Frisco, Texas

A hotel spa inside the Westin Dallas Stonebriar Golf Resort in Frisco, Texas, offering a relaxation lounge and geared toward couples staying on property.

Sedona, Arizona

A boutique resort spa in Sedona with a heated pool, hot tub, yoga and massage, open only to hotel guests.

Savannah, Georgia

A hotel spa at Thompson Savannah in Savannah, Georgia, with a relaxation lounge, open only to hotel guests.

Islamorada, Florida

Hotel spa at Three Waters Resort and Marina in Islamorada, Florida, with outdoor baths, a pool and ocean views, open to resort guests.