Historical Marker USA Center of PopulationHumphrey ParkBoy Scout PondLintonIsland CityHoosierSponslerSummitVicksburgVictoriaSwitz CityEllisWhite RoseMidland JunctionLyonsLone TreeBushrodDixonMidlandBeehunterGambillDuggerShawnee FieldRedcuff CornerFairplay MoundMotorboat LakeShakamak AirportShakamak State ParkGreenbriar LakeIndian PondVon Sloughs AirportSullivan County ParkMaumee HillDillon HillNeed HillJolliff RocksBooe AirportScudder HillAustin Air Ads AirportSullivan County Airport