A swimming pool is a specially designed structure filled with water, used for swimming, relaxation, and recreational activities. Pools can be found in various settings, including private backyards, public parks, and hotels. They come in different shapes and sizes, often made from materials like concrete, fiberglass, or vinyl. Swimming pools can be either above ground or in-ground, and they may include features such as slides, diving boards, and lighting. Regular maintenance is essential to keep the water clean and safe, often involving the use of chemicals like chlorine. Swimming lessons and water sports are common activities enjoyed in pools.