Aria Resort and Casino—The showpiece of CityCenter! Just as Aria ascends to its placement in the Las Vegas skyline, the name derives from an elaborate melody for a single voice rising musically. The 61-story imposing yet graceful curved-glass hotel includes 4,004 rooms, an 1,800-seat showroom, 9 bars and lounges, 16 restaurants, a spa and salon, shopping arcade, pool deck, sizeable conference center, subterranean parking, and the only casino within the CityCenter.