Visitors to CityCenter, the Strip’s newest spectacle, will be driven to look up at the glistening glass and steel. It is an inexorable pull, to cock your head backward and take in the sweep of six high-rise towers — including two that lean — that create an urban scene unlike any other. The man who conceived of this place, however, would like to draw your attention to a small park bench. It is found near the center of the 67-acre site, alongside Aria, the flagship high-rise filled with 4,004 guest rooms.