The Nelson-Atkins Museum expansion in Kansas City, Missouri includes a new underground parking structure with two levels. The top, at grade, is taken up by a very large sculpture by Walter de Maria entitled “One Sun/34 Moons”. The “moons” are circular skylights that admit the water filtered light to the parking below. The garage structure is made of 60ft long by 12ft wide precast concrete “wave T’s” each supported on columns or the walls. They were cast on custom steel forms and are prestressed. A 24in diameter circular styrofoam core is used to lighten the beam. The parking space, 240ft by 328ft in plan, is a unique shape, as the drainage slopes at ground level raise the interior heights from a minimum of 11ft to as much as 16ft.