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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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| Pokagon State Park | State Park | 2.4 | Angola | Indiana |
| Cedar Lake Marsh State Fish and Wildlife Area | State Wildlife Area | 5.2 | Fremont | Indiana |
| Coldwater Lake State Park | State Park | 5.6 | Coldwater | Michigan |
| Gene Stratton Porter State Memorial | State Memorial | 25 | Rome City | Indiana |
| Harrison Lake State Park | State Park | 32.4 | Fayette | Ohio |
| Chain OLakes State Park | State Park | 33.1 | Albion | Indiana |
| Oxbow Lake Wildlife Area | State Wildlife Area | 38.4 | Defiance | Ohio |
| Lake Hudson Recreation Area | State Park | 39.5 | Clayton | Michigan |
| Cambridge Junction Historic State Park | State Park | 45.9 | Brooklyn | Michigan |
| Fort Custer Recreation Area | State Park | 46.2 | Augusta | Michigan |