Using natural stones in your design looks great with your poolside landscape. It takes your pool out of the air of an artificial pond and turns it into a private oasis in a desolate forest. Natural stones such as Travertine- MArble, Limestone and rocks can be arranged on the pool side in certain ways. With these stones, you can design caves where you can take shelter in the shade on hot sunny days or ramps where you can jump into the water.