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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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| Castle Rock State Park | State Park | 4.8 | Oregon | Illinois |
| Lowden State Park | State Park | 8 | Oregon | Illinois |
| Franklin Creek State Park | State Park | 12.2 | Franklin Grove | Illinois |
| Green River Wildlife Mgmt Area | State Wildlife Management Area | 24.9 | Harmon | Illinois |
| Morrison Rockwood State Park | State Park | 27.4 | Morrison | Illinois |
| Ayers Sand Prairie State Nature Preserve | State Nature Preserve | 33 | Savanna | Illinois |
| Lake Le Aqua Na State Park | State Park | 34.7 | Lena | Illinois |
| Rock Cut State Park | State Park | 35 | Loves Park | Illinois |
| Shabbona Lake State Recreation Area | State Recreation Area | 36.2 | Shabbona | Illinois |
| Mississippi Palisades State Park | State Park | 36.8 | Savanna | Illinois |