The 21 Drive-in is a single screen drive-in theater located on Highway 21 in Van Buren, Missouri. It was open in 1952. The 21 Drive-in is another drive-in success story as after several decades of operation, it was closed in the early 1990's. However, it was re-opened in 1997 and continues seasonal operation to this day. The 21 Drive-in has FM audio for the movies, but they still have all their original pole speakers which are in working order.