. . "Sielbeck Forest Natural Area"@en . . . . . . . . . "1998"^^ . . "37.22999954223633"^^ . . "225"^^ . "-88.75920104980469"^^ . . . . . . "Map of the U.S. state of Illinois showing the location of Sielbeck Forest Natural Area"@en . . . . . "11441879"^^ . . . . . . . "Sielbeck Forest Natural Area is an Illinois state park on 385 acres (156 ha) in Johnson County, Illinois, United States."@en . "Sielbeck Forest Natural Area"@en . . . . "Sielbeck Forest Natural Area is an Illinois state park on 385 acres (156 ha) in Johnson County, Illinois, United States."@en . . . . . . . . . . . . . "POINT(-88.759201049805 37.229999542236)"^^ . . . . . . "Sielbeck Forest Natural Area"@en . . . . . . . "1119276093"^^ . . . . . . "37.23 -88.7592" . . . . . . . . . . "1558039.722624"^^ . "2541"^^ . .