Fire pits are designed fixtures meant to contain a controlled fire and prevent it from spreading. Often used to add warmth and ambiance in the backyard of a home or at a restaurant, fire pits make for pleasant gathering spaces for multiple people to sit around. Fire pits vary greatly from rudimentary pits dug into the earth, to ornamental gas burning structures made of stone, brick, and metal. The most common fire pits are pre-made and can be purchased in stores with a range of fuel variations from natural gas to propane, or bio ethanol. Fire pits have great archeological significance, as their remains often preserve information pertaining to past cultures.