Outdoor stages are a popular venue for concerts, festivals and other events. Synonyms for outdoor stage include amphitheater, bandshell, open-air theater, showground, and performance space. An amphitheater is a circular or oval-shaped outdoor stage with tiers of seating for spectators. A bandshell is a structure with a shell-shaped roof where music performances are held. An open-air theater is a stage with no roof or walls, typically set in a picturesque outdoor location. A showground is an area used for agricultural fairs or exhibitions with a stage for entertainment. A performance space is a broad term used to describe any area where musical or theatrical performances take place.