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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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| National Memorial Park | National Memorial | 19.1 | Falls Church | Virginia |
| Gambrill State Park | State Park | 25.1 | Frederick | Maryland |
| George Washington Masonic National Memorial | National Memorial | 25.6 | Alexandria | Virginia |
| Patapsco State Park | State Park | 27 | Ellicott City | Maryland |
| Cathland State Park | State Park | 27.3 | Knoxville | Maryland |
| Fort Hunt National Park | National Park | 28.6 | Mount Vernon | Virginia |
| Conway Robinson Memorial State Forest | State Forest | 29.7 | Gainesville | Virginia |
| Robert M Watkins Regional State Park | State Park | 30.5 | Kettering | Maryland |
| Washington Monument State Park | State Park | 31.1 | Middletown | Maryland |
| Fort Washington National Park | National Park | 32.5 | Fort Washington | Maryland |