Region
United States
22
California
13
Earth (Planet)
12
Washington (State)
6
Arctic regions
5
Alaska
4
Florida
4
Africa
3
Kings Canyon National Park
3
Kings Canyon National Park (Calif.)
3
New Mexico
3
Northwest, Pacific
3
Oregon
3
Sequoia National Park
3
Sequoia National Park (Calif.)
3
Alabama
2
Chincoteague National Wildlife Refuge (Va. and Md.)
2
Don Edwards San Francisco Bay National Wildlife Refuge
2
Don Edwards San Francisco Bay National Wildlife Refuge (Calif.)
2
Georgia
2
Great Basin
2
Great Britain
2
Idaho
2
Ireland
2
Maryland
2
Mississippi River
2
Nevada
2
New England
2
New York (State)
2
North Dakota
2
Rio Grande (Colo.-Mexico and Tex.)
2
Saint John
2
Sheyenne River
2
Sheyenne River (N.D.)
2
United States Virgin Islands
2
Utah
2
Virginia
2
West (U.S.)
2
Wyoming
2
American River Watershed
1
American River Watershed (Calif.)
1
Appalachian Region, Southern
1
Arizona
1
Australia
1
Austria
1
Biscayne National Park
1
Bluestone National Scenic River (W. Va.)
1
Borneo
1
Canada
1
Cheyenne Bottoms
1
more ...