sentences:  A post office has been in operation at Roundhead since 1837.An archaeological site, the Zimmerman Kame, is located in the Roundhead vicinity; it is listed on the National Register of Historic Places.Located at an altitude of , it sits at the intersection of State Routes 117, 235, and 385, north of the northeast corner of Indian Lake and southwest of the city of Kenton, the county seat of Hardin County.