Fountain grass. The fountain grass of Fountain Hills was part of a revitalization project that began in 1960 to improve the flat desert area of ??rural Arizona more desirable to families and potential residents to make. The design of the fountain grass went through several revisions before the final structure was agreed on the planting of fountain grass. The fountain grass is a beautifully sculpted and enormous water lily that seems to rest on the surface of a lake. The lily is composed of blue-gray limestone from Italy. The body of water lilies floating on a 28 acre man-made lake in the heart of the fountain grass.