If heaven has a spa, it must look like this: pristine ivory walls with dark wood accents, a glassy 50-foot indoor lap pool, plush velour sofas and a staff that plies you with truffles and champagne. Since it’s in the posh St. Regis Hotel, the service is as refined and gracious as you’d expect—and the services are as luxurious as they are effective. You can’t go wrong with the Remède Customized Facial ($95–$255), which tops off thorough pore-cleaning and a customized face mask with a decadent essential-oil scalp massage and skinsoftening mud-and-paraffin wraps for hands and feet. It’s an experience that’s so lavish and pampering it’s almost sinful.