Region
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Louisiana
1
Mary McLeod Bethune Council House National Historic Site (Washington, D.C.)
1
Midland
1
Minnesota
1
Missouri
1
Montgomery County
1
Mount Rushmore National Memorial (S.D.)
1
New Columbia
1
New Jersey
1
New York
1
New York (State)
1
Oklahoma
1
Oregon Caves National Monument (Or.)
1
Orlando
1
Pennsylvania Avenue (Washington, D.C.)
1
Pontchartrain, Lake, Watershed
1
Potomac River
1
President's Park (Washington, D.C.)
1
Prince George's County
1
Rock Creek (Md. and Washington, D.C.)
1
Rock Creek Park Public Golf Course (Washington, D.C.)
1
Rock Creek and Potomac Parkway (Washington, D.C.)
1
Saint Lawrence Island
1
Saint Louis
1
San Antonio
1
South Dakota
1
Southeast Federal Center (Washington, D.C.)
1
Southwest Waterfront (Washington, D.C.)
1
Swain County
1
Swain County (N.C.)
1
Ukraine
1
Utah
1
Vancouver
1
Vermont
1
Washington (State)
1
Washington Channel (Washington, D.C.)
1
Washington Region
1
West Potomac Park (Washington, D.C.)
1