The Waldorf Astoria Spa by Guerlain is a 24,000 square foot facility that includes 22 treatment rooms. Body therapies, massages and other treatments geared toward rejuvenation, cleansing and overall well-being aid melt away the stress of the weary traveler and help leisure travelers sink deeper into the magnificent melt known as "vacation brain." Go a la carte or indulge in one of their half-day spa packages and if you're going to visit the expansive fitness center, or perhaps enjoy an hour-long yoga class, do so beforehand. Once you're appropriately tenderized you'll be better suited for a pre-dinner nap than a treadmill 5k.