Region
United States
Foreign countries
8
New York (State)
8
Canada
7
Colorado
7
New York
6
North America
5
Washington (D.C.)
4
Moon
3
Arab countries
2
Caribbean Area
2
Mexico
2
Ohio
2
Utah
2
West (U.S.)
2
Arlington
1
Atlantic Ocean
1
Australia
1
Brooklyn (New York)
1
California
1
China
1
Columbia River Watershed
1
Developing countries
1
Europe
1
Gulf Coast (U.S.)
1
Gulf States
1
Hopewell Culture National Historical Park (Ohio)
1
Kansas
1
Middle East
1
Mount Timpanogos Wilderness (Utah)
1
Nevada
1
Olympic National Forest
1
Olympic National Forest (Wash.)
1
Pacific Area
1
Pacific Ocean
1
Puerto Rico
1
Saudi Arabia
1
Southern States
1
Southwestern States
1
Soviet Union
1
Texas
1
Travis County
1
Virginia
1
Washington (State)
1