Region
United States
165
Outer space
34
California
5
Colorado
5
Wyoming
4
Alaska
3
Rocky Mountains
3
Venus (Planet)
3
Washington (State)
3
Montana
2
Uranus (Planet)
2
Africa
1
Arena, Point (Calif.)
1
Big Horn County
1
Chesapeake Bay Region (Md. and Va.)
1
Denali National Park and Preserve (Alaska)
1
Earth (Planet)
1
Florida
1
Florida Keys
1
Florida Keys National Marine Sanctuary (Fla.)
1
Fort Ord (Calif.)
1
Gambia
1
George Washington Carver National Monument (Mo.)
1
Grand Teton National Park (Wyo.)
1
Jupiter (Planet)
1
Mars (Planet)
1
Mount Etna Iron Furnace National Historic Site (Pa.)
1
Mount Rainier National Park (Wash.)
1
North Cascades National Park (Wash.)
1
Oregon National Historic Trail
1
Pacific Coast
1
Palos Verdes Peninsula
1
Palos Verdes Peninsula (Calif.)
1
Pennsylvania
1
Philadelphia
1
Piedras Blancas Historic Light Station Outstanding Natural Area (Calif.)
1
Piedras Blancas, Point (Calif.)
1
Point Arena (Calif.)
1
Saint Helens, Mount (Wash.)
1
Southwestern States
1
Sun
1
Trinidad (Calif.)
1
Tuskegee Institute National Historic Site (Tuskegee, Ala.)
1
Washington (D.C.)
1
West (U.S.)
1
Yellowstone National Park
1
Yosemite National Park (Calif.)
1