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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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| Robert M Watkins Regional State Park | State Park | 7.7 | Kettering | Maryland |
| Cedarville State Forest | State Forest | 8 | Brandywine | Maryland |
| Fort Washington National Park | National Park | 12.2 | Fort Washington | Maryland |
| Fort Hunt National Park | National Park | 12.7 | Mount Vernon | Virginia |
| George Washington Masonic National Memorial | National Memorial | 13.5 | Alexandria | Virginia |
| Mason Neck State Park | State Park | 21.2 | Lorton | Virginia |
| National Memorial Park | National Memorial | 21.7 | Falls Church | Virginia |
| Mattawoman State Natural Environmental Area | State Park | 22 | Indian Head | Maryland |
| Chapel Point State Park | State Park | 23.3 | Port Tobacco Village | Maryland |
| Jonas Green State Park | State Park | 23.6 | Annapolis | Maryland |