Region
California
2
Chesapeake and Ohio Canal (Md. and Washington, D.C.)
2
Chesapeake and Ohio Canal National Historical Park
2
Pennsylvania
2
Crater Lake National Park (Or.)
1
Gettysburg
1
Gettysburg National Military Park (Pa.)
1
Great Basin
1
Great Basin National Park (Nev.)
1
Inyo County
1
Johnstown Flood National Memorial
1
Johnstown Flood National Memorial (Pa.)
1
Manzanar National Historic Site (Calif.)
1
Owens Valley
1
Sequoia National Park
1
United States
1