Fountains are decorative structures that release water into the air or a basin. They can be found in parks, gardens, and public squares, often serving as a focal point in the landscape. Fountains can vary in size and design, from simple spouts to elaborate sculptures featuring multiple tiers and intricate carvings. The water in fountains can be powered by pumps, which circulate it continuously, creating a pleasing visual and auditory experience. Many fountains also incorporate lighting, enhancing their beauty at night. Some famous examples include the Trevi Fountain in Rome and the Bellagio Fountains in Las Vegas.