Hidden behind the Michael Kohn gallery, this oasis is exclusive enough for celebs but comfortable enough for the rest of us.

Skin Haven is like an anti-day-spa spa. It's by appointment only and has only three treatment rooms, so it feels like an exclusive, never crowded, insider's hideaway. The dcor is more organic than the usual faux Zen, with natural wood accents, cool concrete floors, an earthy color palate and a lounge that's as comfortable as a living room. This all directly reflects owner Sharon Ronen's personal philosophies, who traded in the stressful life of a music exec for the more serene scene of skincare. In the treatment rooms, she's like a mad scientist, creating custom-made facials.

Using Bioelements products (all natural, no animal byproducts or synthetics), Ronen and her staff create an ultra-personalized regiment of cleansing and exfoliating to perfectly match an individual's skin. You leave (if you actually feel like leaving) absolutely glowing. Ronen herself is booked at least two months out, but another aesthetician, who works her own type of magic, is also on hand; plus there are several massage therapists for body work. Spa memberships are available, which guarantee several treatments throughout the year, admission to workshops, and use of the lounge any time you need to get away from it all.—Lesley Balla