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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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| West Okaw River State Fish and Wildlife Mgmt Area | State Wildlife Area | 9.2 | Sullivan | Illinois |
| Wolf Creek State Park | State Park | 9.8 | Windsor | Illinois |
| Hidden Springs State Forest | State Forest | 19.5 | Strasburg | Illinois |
| Spitler Woods State Park | State Park | 21.8 | Mount Zion | Illinois |
| Fox Ridge State Park | State Park | 25.2 | Charleston | Illinois |
| Walnut Point State Park | State Park | 28.9 | Oakland | Illinois |
| Lincoln Trail Homestead State Park | State Park | 33.3 | Decatur | Illinois |
| Ramsey Lake State Park | State Park | 42 | Ramsey | Illinois |
| Weldon Springs State Park | State Park | 42.6 | Clinton | Illinois |
| Clinton Lake State Recreation Area | State Recreation Area | 43.3 | De Witt | Illinois |