Region
United States
81
Alaska
5
California
4
Colorado
4
Washington (State)
4
Arizona
3
Great Lakes (North America)
3
Nevada
3
New Mexico
3
Florida
2
Great Lakes Region (North America)
2
Hawaii
2
Mexico, Gulf of
2
Nebraska
2
Oregon
2
Puerto Rico
2
Texas
2
Utah
2
Africa
1
Albuquerque
1
Albuquerque Region
1
Alpine County
1
Antarctica
1
Apalachicola River
1
Aravaipa Canyon (Ariz.)
1
Arctic regions
1
Atlantic Coast (U.S.)
1
Brazil
1
Cape Cod
1
Carson River Valley
1
Carson River Watershed
1
Clark County
1
Colorado River (Colo.-Mexico)
1
Commencement Bay
1
Connecticut
1
Cook Inlet Region
1
Cook Inlet Region (Alaska)
1
Corpus Christi Bay
1
Cuba
1
Detroit River (Mich. and Ont.)
1
Eagle River (Anchorage, Alaska)
1
Fort Richardson (Alaska)
1
Grand Canyon National Park
1
Greenland
1
Illinois
1
Indiana
1
Kenosha County
1
Klatt Bog Area
1
Lincoln
1
Lincoln County
1
more ...