the Frank Lloyd Wright designed service station in Minnesota

Wright had designed station owner Ray Lindholm's house in 1952, and, knowing Lindholm worked in the oil business, presented him with a proposal to design the gas station envisioned as part of Broadacre City. Lindholm, seeing an opportunity to beautify gas station design, agreed to his plan, and Wright completed his design in 1956. Despite the importance of gas stations to the Broadacre City concept, the building was the only service station Wright designed

thanks Dennis!
https://en.wikipedia.org/wiki/R._W._Lindholm_Service_Station