Ohio State Route 722 is a rural east-west route along the southern edge of Darke County. The western end is at Ohio Route 121, southwest of New Madison. The eastern end of Ohio Route 722 is at Ohio Route 49, northwest of Phillipsburg. The highway only passes through three tiny towns: Castine, Ithaca, and Gordon.
My photo for Ohio Route 722 comes from Castine, at US Route 127. The guide marker shown faces north for southbound traffic on US Route 127. This photo was taken as I was taking a roundabout way to Columbus in September 2017.