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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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| Starved Rock State Park | State Park | 3 | Oglesby | Illinois |
| Buffalo Rock State Park | State Park | 6.3 | Ottawa | Illinois |
| Fox River State Park | State Park | 11.6 | Ottawa | Illinois |
| Donnelley/DePue State Park | State Park | 14.9 | DePue | Illinois |
| Lake Depue State Fish and Wildlife Area | State Wildlife Area | 16.3 | Princeton | Illinois |
| Illini State Park | State Park | 16.4 | Marseilles | Illinois |
| Marseilles State Fish and Wildlife Area | State Wildlife Area | 18.2 | Marseilles | Illinois |
| La Salle Lake State Fish and Wildlife Area | State Wildlife Area | 20.3 | Marseilles | Illinois |
| Miller Anderson Woods State Nature Preserve | State Nature Preserve | 20.4 | Tiskilwa | Illinois |
| Norwegian Settlers State Memorial | State Memorial | 22 | Sheridan | Illinois |