A turret is a small, tower-like structure that protrudes from the walls or corners of a building. It typically has several sides and is capped with a roof. Turrets are often seen in medieval castles, fortresses, and towers, but can also be found on more modern buildings such as churches, homes, and skyscrapers. They serve various purposes including providing additional space or living quarters, acting as lookout points, and adding architectural interest or charm to a building's design.