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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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| Buffalo Rock State Park | State Park | 5.3 | Ottawa | Illinois |
| Illini State Park | State Park | 5.9 | Marseilles | Illinois |
| Starved Rock State Park | State Park | 8.6 | Oglesby | Illinois |
| Marseilles State Fish and Wildlife Area | State Wildlife Area | 8.7 | Marseilles | Illinois |
| Norwegian Settlers State Memorial | State Memorial | 10.9 | Sheridan | Illinois |
| La Salle Lake State Fish and Wildlife Area | State Wildlife Area | 11.3 | Marseilles | Illinois |
| Matthiessen State Park | State Park | 11.6 | Oglesby | Illinois |
| William G Stratton State Park | State Park | 20.7 | Morris | Illinois |
| Silver Springs State Park | State Park | 24.4 | Yorkville | Illinois |
| Heidecke State Fish and Wildlife Area | State Wildlife Area | 25.5 | Morris | Illinois |