The Missouri Botanical Garden has a special exhibit of sculpture by Niki de Saint Phalle. The mosaic sculptures are made in a rainbow of colors and materials from fiberglass, stones, glass, mirrors, and semi-precious materials. This was a giant skull sitting on the grass. We all thought this would be pretty cool to have in our front yard. (Click skull to view full size.)
P.S. Yes, there are people sitting inside the skull. You can see their legs through its teeth.