Region
United States
10
New Mexico
4
California
2
England
2
Europe
2
Great Lakes (North America)
2
Japan
2
Michigan, Lake
2
Organ Mountains Wilderness
2
Washington (State)
2
Antarctic Ocean
1
Arizona
1
Ashland
1
Bonin Islands
1
Brazil
1
Cold regions
1
Columbia Region
1
Davisville Region
1
Emery County
1
Fort Lewis
1
Galapagos Islands
1
Great Britain
1
Hanford Reach
1
Hanford Site (Wash.)
1
Harding County
1
Himalaya Mountains
1
India
1
Jammu and Kashmir
1
Kirkwood-Cohansey Aquifer (N.J.)
1
Latin America
1
Long Island
1
Mars (Planet)
1
Massachusetts
1
McKinley County
1
Mediterranean Region
1
Mediterranean Sea
1
Michigan
1
Molalla River
1
New Jersey
1
New York (State)
1
New Zealand
1
North America
1
Ohio River Valley
1
Ohio Shale
1
Oregon
1
Organ Mountains
1
Organ Mountains Wilderness (N.M.)
1
Organ Pipe Cactus National Monument
1
Pocomoke River Watershed (Del. and Md.)
1
Polar regions
1
more ...