The spa jacuzzi at Vdara at CityCenter in Las Vegas. This is the kind of spa you'll want to come to early and stay late, with its candlelit jacuzzi room, steamroom and sauna, and a meditation lounge perfect for snoozing under a cozy blanket to the sound of running water after a relaxing treatment. (Locals note: Vdara offers a 20 percent discount, and you don't have to be a guest at the hotel.)