Region
United States
4
California
2
Rocky Mountains
2
Alaska
1
America
1
Denali National Park and Preserve (Alaska)
1
George Washington Carver National Monument (Mo.)
1
Grand Teton National Park (Wyo.)
1
Mount Rainier National Park (Wash.)
1
North Cascades National Park (Wash.)
1
Pennsylvania
1
Philadelphia
1
Southwestern States
1
Tuskegee Institute National Historic Site (Tuskegee, Ala.)
1
Washington (D.C.)
1
Washington (State)
1
Yellowstone National Park
1
Yosemite National Park (Calif.)
1