Region
United States
20
New Mexico
5
Chaco Canyon
3
Chaco Canyon (N.M.)
3
Virginia
3
Alaska
2
Antietam National Battlefield (Md.)
2
Chalmette Unit, Jean Lafitte National Historical Park and Preserve (La.)
2
Chickamauga and Chattanooga National Military Park (Ga. and Tenn.)
2
Colorado
2
Gettysburg National Military Park (Pa.)
2
Jean Lafitte National Historical Park and Preserve (La.)
2
Little Bighorn Battlefield National Monument (Mont.)
2
Louisiana
2
Manassas National Battlefield Park (Va.)
2
Maryland
2
Pennsylvania
2
Alaska Peninsula
1
America
1
Antietam National Battlefield
1
Assateague Island (Md. and Va.)
1
Aztec Ruins National Monument (N.M.)
1
Baltimore
1
Baltimore (Md.)
1
Chaco Canyon Region
1
Chaco Canyon Region (N.M.)
1
Chaco Culture National Historical Park (N.M.)
1
Chamizal National Memorial (El Paso, Tex.)
1
Chesapeake Bay (Md. and Va.)
1
Chulitna River
1
Chulitna River (Alaska)
1
Everglades
1
Florida
1
Fort McHenry National Monument and Historic Shrine (Baltimore, Md.)
1
George Washington Birthplace National Monument (Va.)
1
Georgia
1
Gettysburg
1
Great Lakes (North America)
1
Harpers Ferry (W. Va.)
1
Hopewell Culture National Historical Park
1
Idaho
1
Knife River Indian Villages National Historic Site (N.D.)
1
Kobuk River Valley
1
Kobuk River Valley (Alaska)
1
Lake Clark National Park and Preserve
1
Lake Clark National Park and Preserve (Alaska)
1
Lincoln Home National Historic Site (Springfield, Ill.)
1
Manassas (Va.)
1
Mexico
1
Missouri River
1
more ...