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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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| Washington Monument State Park | State Park | 6.7 | Middletown | Maryland |
| Gambrill State Park | State Park | 9.2 | Frederick | Maryland |
| Greenbrier State Park | State Park | 9.4 | Boonsboro | Maryland |
| Fort Frederick State Park | State Park | 24.3 | Big Pool | Maryland |
| Seneca Creek State Park | State Park | 27.3 | Gaithersburg | Maryland |
| Mont Alto State Forest | State Forest | 28.9 | Quincy | Pennsylvania |
| Mont Alto State Park | State Park | 30.7 | Mont Alto | Pennsylvania |
| Sky Meadows State Park | State Park | 33.3 | White Post | Virginia |
| Gettysburg National Historical Park | National Historical Park | 33.9 | Gettysburg | Pennsylvania |
| Berkeley Springs State Park | State Park | 34.9 | Berkeley Springs | West Virginia |