| Antietam National Battlefield |
| Appalachian National Scenic Trail |
| Assateague Island National Seashore |
| Chesapeake & Ohio Canal National Historical Park |
| Catoctin Mountain Park |
| Clara Barton National Historic Site |
| Fort McHenry National Monument and Historic Shrine |
| Fort Washington Park |
| George Washington Memorial Parkway |
| Greenbelt Park |
| Hampton National Historic Site |
| Harriet Tubman Underground Railroad National Historical Park |
| Monocacy National Battlefield |
| Piscataway Park |
| Potomac Heritage National Scenic Trail |
| Thomas Stone National Historic Site |
