Region
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Niagara Falls State Park (N.Y.)
1
Northwest, Pacific
2
Olympic National Park (Wash.)
2
Oregon
2
Pennsylvania
3
Riverside
1
Russia (Federation)
1
Scotland
1
South Africa
2
South Dakota
1
Southern States
3
Spain
1
Texas
5
Tioga County
1
Tioga County (Pa.)
1
United States
103
United States, West
1
Utah
1
Virginia
1
Washington (State)
3
West (U.S.)
12
Wisconsin
8
Yakima River Valley
2
Yellowstone National Park
1
Yosemite National Park (Calif.)
1
Zimbabwe
1
États-Unis
1