Region
prev ...
Puerto Rico
82
Hawaii
81
North America
79
New Hampshire
76
West (U.S.)
75
Coconino County
74
Illinois
73
Jefferson County
73
Iowa
72
Kane County
68
Powder River Basin (Wyo. and Mont.)
68
Vermont
68
Alabama
67
Rio Blanco County
67
Fremont County
66
Sonora (Mexico : State)
66
Indiana
65
Carbon County
63
West Virginia
60
Grant County
58
Ontario
58
Emery County
56
Middle East
56
Campbell County
53
Custer County
53
Black Hills (S.D. and Wyo.)
52
Grand County
51
McKinley County
51
San Juan County (N.M.)
51
Sweetwater County
50
Clark County
49
San Miguel County
49
China
48
Siskiyou National Forest (Or. and Calif.)
48
Venus (Planet)
47
Iron County
46
San Diego County
46
Washington County
46
Douglas County
45
Moffat County
45
Chihuahua (Mexico : State)
44
Humboldt County
44
Middle West
44
Yellowstone National Park
44
Europe
42
Rhode Island
42
Tongass National Forest (Alaska)
41
Africa
40
Floridan Aquifer
40
Hidalgo County (Tex.)
40
more ...