If it's Zen-like tranquility you're after, then The Landmark Mandarin Oriental Spa is the place to park your weary limbs. Here you'll have a hard time deciding where to indulge in this facility that covers two entire floors of the hotel. Rejuvenation is on hand in the vitality pools or in an "experience" shower. If you're visiting with a partner, be sure to relax in the Sanctuary Suite with its heated amethyst crystal steam shower, vitality tub and futon mattress in front of a flat-screen TV.