The world's first installed parking meter was in Oklahoma City, on July 16, 1935. Carl C. Magee, of Oklahoma City, Oklahoma, is generally credited with originating the parking meter. He filed for a patent for a "coin controlled parking meter" on May 13, 1935.
Oklahoma's state capitol building is the only capitol in the world with an oil well under it. Although its legal description is Capitol Site #1, it is referred to as Petunia #1 because it was originally drilled in the middle of a flower bed.