I have read about and reported on CityCenter in Las Vegas for almost eight years. I finally had an opportunity to take a look at least part of the complex during a tour yesterday. The tour was part of the second annual Lodging Green & Sustainability Conference & Expo. The focus of the tour was the LEED Gold certified ARIA Resort & Casino. Christopher Brophy, Vice President of Sustainability for MGM Resorts International, led the tour which also included part of The Shops at Crystals, the upscale retail complex that is also part of CityCenter. One of the first things I noticed was the volume of artwork. Brophy says $20 million was spent on artwork for CityCenter. A Maya Lin sculpture of the Colorado River sits above the check-in area in the lobby of the ARIA Resort & Casino. Design features in the casino area also reflect the rivers and canyons of the West. Also on property: a Henry Moore sculpture.