An artificial waterfall is a water feature or fountain which imitates a natural waterfall. Artificial waterfalls have long been featured in traditional Japanese gardens, where they can serve to highlight a scene or to provide focus. The classic gardening manual Sakuteiki, written in the mid-to-late 11th century, lists nine different types. The Cascata delle Marmore is an example of a man-made waterfall created by the ancient Romans.