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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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| Ottawa National Wildlife Refuge | National Wildlife Refuge | 1.3 | Benton | Ohio |
| Cedar Point National Wildlife Refuge | National Wildlife Refuge | 7.7 | Oregon | Ohio |
| Mallard Club Marsh Wildlife Area | State Wildlife Area | 8.7 | Curtice | Ohio |
| Maumee Bay State Park | State Park | 10.2 | Oregon | Ohio |
| Catawba Island State Park | State Park | 17.7 | Port Clinton | Ohio |
| South Bass Island State Park | State Park | 18.3 | Put-in-Bay | Ohio |
| East Harbor State Park | State Park | 19.9 | Lakeside Marblehead | Ohio |
| Sterling State Park | State Park | 22.4 | Monroe | Michigan |
| Fort Miamis State Memorial | State Memorial | 22.9 | Maumee | Ohio |
| Fort Meigs State Memorial | State Memorial | 24.6 | Perrysburg | Ohio |