A fountain is a structure that sends water into the air for decorative or functional purposes. It can be found in parks, gardens, and public squares, often serving as a centerpiece. Fountains can vary in design, from simple spouts to elaborate sculptures, and they may use pumps to circulate water. Fountains have been used since ancient times, with notable examples like the Trevi Fountain in Rome and the Bellagio Fountains in Las Vegas. They can also provide a soothing sound of flowing water, making them popular in landscaping and urban design.