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Forest of the Wabash

Bell Smith Springs

Lower Cache River

LaRue-Pine Hills

Fults Hill Prairie

Funks Grove Nature Preserve

Markham Prairie

Giant City

Heron Pond

Horseshoe Lake

Illinois Beach

Little Grand Canyon

Lusk Creek Canyon

Mississippi Palisades

Busse Forest Nature Preserve

Allerton Natural Area

Volo Bog

Wauconda Bog

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Illinois National Natural Landmarks (clickable map)