Region
Afghanistan
2
Alaska
4
Alaska Peninsula
1
Alaska Peninsula (Alaska)
1
Alaska, Southwest
1
Aniakchak National Monument and Preserve (Alaska)
1
Arkansas
1
Broward County
1
Broward County (Fla.)
1
Cache River National Wildlife Refuge
1
Cache River National Wildlife Refuge (Ark.)
1
California
3
California Highway 49 (Calif.)
1
Canada
1
Cape Cod
1
Chesapeake Bay (Md. and Va.)
1
Chesapeake Bay Watershed
1
China
2
Cumberland Gap National Historical Park
1
Delta Junction Region
1
DuPage County
1
European Union countries
4
Florida
2
France
1
Germany
2
Greene County
1
Hawaii
1
High Plains
1
High Plains (U.S.)
1
High Plains Aquifer
1
Illinois
1
India
2
Katmai National Park and Preserve (Alaska)
1
Kenai Fjords National Park (Alaska)
1
Kilauea Volcano
1
Kilauea Volcano (Hawaii)
1
Lake Clark National Park and Preserve (Alaska)
1
Lake Tahoe Watershed
1
Long Island
1
Long Island (N.Y.)
1
Long Island City
1
Lower Rio Grande Valley (Tex.)
1
Maine
1
Mars (Planet)
1
Massachusetts
1
Mexican American Border Region
1
Mississippi River
1
Mississippi River Valley
1
Missouri
2
Nevada
1
more ...