High Quality Content by WIKIPEDIA articles! Aria Resort and Casino is a luxury resort and casino in the CityCenter complex on the Las Vegas Strip in Paradise, Nevada. Aria consists of two curved glass and steel highrise towers adjoined at the center. It opened on December 16, 2009 as a joint venture between MGM Resorts International and Infinity World Development. At 4,000,000 sq ft (370,000 m2) and 600 ft (180 m) in height, it is the largest and tallest structure at CityCenter.