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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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| Gene Stratton Porter State Memorial | State Memorial | 9.7 | Rome City | Indiana |
| Pokagon State Park | State Park | 31.1 | Angola | Indiana |
| Marsh Lake Wetlands State Fish and Wildlife Area | State Wildlife Area | 33.1 | Fremont | Indiana |
| Cedar Lake Marsh State Fish and Wildlife Area | State Wildlife Area | 37.6 | Fremont | Indiana |
| Coldwater Lake State Park | State Park | 38.1 | Coldwater | Michigan |
| Salamonie River State Forest | State Forest | 40.1 | Lagro | Indiana |
| Ouabache State Park | State Park | 44.3 | Bluffton | Indiana |
| Oxbow Lake Wildlife Area | State Wildlife Area | 49.1 | Defiance | Ohio |
| Frances Slocum State Forest | State Forest | 52.1 | Butler | Indiana |
| Potato Creek State Park | State Park | 52.7 | North Liberty | Indiana |