The newly developed CityCenter community in Las Vegas, Nev. recently added a piece of environmental art to its fine art collection. The 87-foot long, 3,700 pound sculpture hangs horizontally from steel cables above a registration desk. The sculpture depicts the Colorado River, complete with its meanders and swells at Lake Powell and Lake Mead. The sculpture was also made with environmentally conscious materials, being cast in reclaimed silver. It is aptly named "Silver River."