The Cesar Pelli–designed centerpiece of the hyper-anticipated 67-acre CityCenter, Aria meets all the criteria of the now-standard Vegas mega-hotel formula: A whopping 4,004 rooms—check. A casino the size of three football fields—check. Sixteen wildly varied restaurants, complete with celebrity chefs—check. An Elvis-themed Cirque du Soleil extravaganza and dancing fountains at the front entrance—check, check. The resort does everything in an unabashedly big way, but beyond the razzle-dazzle veneer are unique triumphs that include bragging rights for being the world's largest LEED Gold–certified building and an impressive collection of eye-catching modern art (among them a suspended Maya Lin sculpture inspired by the Colorado River, and a 266-foot-long LED installation by Jenny Holzer). Although rooms are a hike from the elevator, the tower's crescent shape and floor-to-ceiling windows ensure that all have great views—either of the desert or the leaning Veer Towers and the irregular angles of the Daniel Libeskind–designed Crystals shopping complex, next door. Comfortably large and muted in tone, the rooms come equipped with a nifty bedside touch screen controlling the temperature, curtains, and entertainment. Aria's epic scale means that individualized attention is rare but every craving is literally satisfied: The buffet feeds casual diners, the restaurants Jean-Georges and the terrific Julian Serrano please gourmets, and celebrity DJs spin for club hoppers at the velvet-rope dual-level Haze. Centrally located on the Strip, Aria also offers excellent value—just beware the outrageous amenity surcharges, including $35 a day for gym and spa access.