A fire pit is a small, contained outdoor area where a fire can be built and maintained. It usually consists of a circular or square stone-filled depression in the ground, with walls made from stones, bricks, or other materials to contain the fire and prevent it from spreading. Fire pits are often used for cooking, heating, lighting, and social gatherings, such as campfires or bonfires. They can be built in backyards, parks, campsites, or other outdoor spaces where a fire is permitted.