Experience the true expertise of Ultimate Pools by Fetter with rock waterfalls, caves, and custom built slides. These features are great additions to any pool. Moss rock boulders are formed into natural looking waterfalls and create a peaceful atmosphere with what sounds like natural flowing water. Slides are fun for the entire family and can be made to look like part of a natural lagoon, lake or pond with custom carvings of rock or stone. Add a cave to your slide or waterfall for a place to hide and relax and listen to the flowing water.