

The Cosmopolitan multiplies Vegas luxe to the nth power: a 100,000-square-foot casino, three pools, 32 spa treatment rooms and suites, Turkish-style hammam, and restaurants that include outposts of New York's Blue Ribbon, Scarpetta, and Milos Estiatorio. Its edgy art collection that extends from top to parking garage, wild New Year's Eve performances (Bruno Mars and Lady Gaga with Tony Bennett have headlined in the past), and outdoor concerts under the Boulevard Pool's massive marquee have secured the Cosmo as the favorite of Vegas's younger (or, at least, young at heart) demographic. (Rooms, from $195)