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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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| Potato Creek State Park | State Park | 14.1 | North Liberty | Indiana |
| Kingsbury State Fish and Wildlife Area | State Wildlife Area | 17.3 | Walkerton | Indiana |
| Kingsbury State Fish And Game Area | State Wildlife Area | 18.8 | La Porte | Indiana |
| Tippecanoe River State Park | State Park | 21.1 | Winamac | Indiana |
| Winamac State Fish and Wildlife Area | State Wildlife Area | 21.7 | Winamac | Indiana |
| Kaukakee State Fish and Wildlife Area | State Wildlife Area | 22.4 | North Judson | Indiana |
| Warren Woods State Park | State Park | 37.7 | Sawyer | Michigan |
| Warren Dunes State Park | State Park | 41.8 | Sawyer | Michigan |
| Indiana Dunes State Park | State Park | 44.7 | Chesterton | Indiana |
| Frances Slocum State Forest | State Forest | 45.2 | Butler | Indiana |