Palm Springs, California
Adults-only hot springs resort on Miracle Hill in Desert Hot Springs with private mineral tubs, a Finnish sauna, salt room and 35 spa treatments.
$$$
Spas with private suites
3 spas match
Scottsdale, Arizona
North Scottsdale day spa with massage, facials, sauna, steam and a thermal pool, plus private suites for couples and groups.
$$Napa Valley, California
Hotel day spa atop the Archer in downtown Napa with a water deck, fitness studio access and treatment rooms; reservations required.
$$$