. . . "Heron Pond \u2013 Little Black Slough Nature Preserve"@en . "Heron Pond \u2013 Little Black Slough Nature Preserve"@en . . . "1006514432"^^ . . "37.36700057983398"^^ . . . "22242065"^^ . "-88.94999694824219"^^ . . . . "Heron Pond \u2013 Little Black Slough Nature Preserve is a parcel of protected wetland property located approximately 5 miles (8 km) southwest of Vienna in Johnson County, Illinois. It was designated a National Natural Landmark in 1972. As part of the Cache River basin, it is classified as a wetland of international importance under the Ramsar Convention."@en . . "7531199.8020864"^^ . . . . . . . . "--11-01"^^ . . . . . . . "37.367 -88.95" . . . . . . . . . . . "Map of Illinois"@en . . . . . . . . . . . . . . . . . . . "4182"^^ . "Heron Pond \u2013 Little Black Slough Nature Preserve"@en . . . . . . . . . . . . "Heron Pond \u2013 Little Black Slough Nature Preserve is a parcel of protected wetland property located approximately 5 miles (8 km) southwest of Vienna in Johnson County, Illinois. It was designated a National Natural Landmark in 1972. As part of the Cache River basin, it is classified as a wetland of international importance under the Ramsar Convention."@en . . . . . . . . . . . . . . . . . . "Heron Pond"@en . "POINT(-88.949996948242 37.367000579834)"^^ . "Heron Pond in Cache River State Natural Area.jpg"@en . . . .