South to North view. Rainbow Pool: 246'-9" long; 147'-8" wide. "Academy Black" and "Mount Airy" masoned granite were selected to reconstruct the Rainbow Pool. "Mount Airy," granite quarried in North Carolina, is the original coping stone of the Rainbow Pool. To enhance the aesthetic appearance of the water surface of the pool, an apron of "Academy Black," granite quarried in California, was be used for the vertical interior surfaces.