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| Lighthouse |
| Metro and City Park |
| National Forest |
| National Historic Landmark |
| National Historic Site |
| National Historical Park |
| National Memorial |
| National Park |
| National Recreation Area |
| National Seashore |
| National Wildlife Area |
| National Wildlife Refuge |
| State Fish Hatchery |
| State Fishery Area |
| State Forest |
| State Historic Site |
| State Memorial |
| State Natural Area |
| State Nature Preserve |
| State Nursery |
| State Park |
| State Preserve |
| State Recreation Area |
| State Reserve |
| State Wildlife Area |
| State Wildlife Management Area |
| State Wildlife Refuge |
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| Fort Creve Coeur State Park | State Park | 9.9 | Creve Coeur | Illinois |
| Sand Ridge State Forest | State Forest | 13.7 | Quiver | Illinois |
| Jubilee College State Park | State Park | 14.7 | Brimfield | Illinois |
| Chautaugua National Wildlife Refuge | National Wildlife Refuge | 18 | Glasford | Illinois |
| Dickson Mounds State Park | State Park | 24.6 | Lewistown | Illinois |
| Snakeden Hollow State Fish and Wildlife Area | State Wildlife Area | 32.3 | Victoria | Illinois |
| Mason County Wildlife Refuge and Recreation Area | State Wildlife Refuge | 33.5 | Kilbourne | Illinois |
| Cameron National Wildlife Refuge | National Wildlife Refuge | 37.6 | Henry | Illinois |
| Railsplitter State Park | State Park | 39.2 | Lincoln | Illinois |
| Lincolns New Salem State Park | State Park | 43 | Petersburg | Illinois |