A fountain is a decorative structure that typically features water flowing from a source, often into a basin or pool. Fountains can be found in various settings, including parks, gardens, and public squares. They serve both aesthetic and functional purposes, providing a calming sound of flowing water and often cooling the surrounding air. Fountains can vary in design, from simple spouts to elaborate sculptures. Many are powered by pumps that circulate water, while others may rely on gravity. Famous examples include the Trevi Fountain in Rome and the Bellagio Fountains in Las Vegas, which are known for their stunning displays.