Lembke LandingBoy Scout HillVolcano HillIonia 'Volcano' Historical MarkerNewcastleBurbank LakeUnion County Waterfowl Production AreaMJ Aviation IIBurbankElk PointPonca State ParkPonca State Park Historical MarkerBuckskin Hills State Wildlife Management AreaBuckskin Hills LakeLewis and Clark Camp Sites: August 23, 24 and 25, 1804 Historical MarkerMulberry Bend State Wildlife Management AreaJunction CityPonca Historical MarkerMattison ParkPoncaMcKays Trailer CourtHoffmans Trailer CourtMaskellHarold Davidson FieldPrentis ParkRichlandCotton ParkLime GroveVermillionMartinsburgObertObert ParkBroken Kettle Grasslands PreserveDixon CountyZekin LakeSpinkJeffersonUnion CountyWaterburyGreenfield