Region
United States
Alaska
5
American Discovery Trail
2
Kentucky
2
Mountains to Sound Greenway (Wash.)
2
North Country National Scenic Trail
2
Northern Mariana Islands
2
Palau
2
Puerto Rico
2
Appalachian Region
1
Arctic regions
1
Bikini Atoll
1
Bikini Atoll (Marshall Islands)
1
Brown v. Board of Education National Historic Site (Topeka, Kan.)
1
California
1
European Union countries
1
Hawaii
1
Marshall Islands
1
Mexico
1
Mexico, Gulf of
1
Mill Springs Battlefield (Ky.)
1
Mississippi
1
New York (State)
1
Northeastern States
1
Oregon
1
Vicksburg National Military Park (Miss.)
1
Washington (D.C.)
1
West Valley
1