An artificial waterfall is a water feature or fountain which imitates a natural waterfall. Artificial waterfalls installed inside of buildings can be small or quite large. Some of the benefits of indoor waterfalls are considered to be their production of white noise, humidity, negative ions, as well as naturally peaceful feelings engendered among onlookers. In landscape architecture and garden design, a water feature is one or more items from a fountains, pools, ponds, cascades, waterfalls, and streams. A water feature may be indoor or outdoor and can be any size, from a desk top water fountain to a large indoor waterfall that covers an entire wall in a large commercial building, and can be made from any number of materials, including stone, granite, stainless steel, resin, and glass. Most water features are electronically controlled.