Region
West (U.S.)
United States
7
China
2
California
1
Colorado
1
Coronado National Forest (Ariz. and N.M.)
1
Hoover Dam (Ariz. and Nev.)
1
Idaho
1
Lewis and Clark National Historic Trail
1
Mormon Pioneer National Historic Trail
1
Rocky Mountains Region
1
South Dakota
1
Southern States
1
Southwest, New
1
Yellowstone National Park
1