Granite was used for stairs and curbstones. But he educated himself - on the curbstones of Keokuk. A network of cobblestone driveways with granite curbstones run through the cemetery. In auto racing, curbs are flat curbstones lining the corners or chicanes of racing tracks. Curbstones, doorsteps, thresholds, and floors of simple mosaic layers are found all over the ruins.