Region
United States
167
England
16
Great Britain
16
Scotland
6
Washington (D.C.)
4
Taxation
3
California
2
Captain John Smith Chesapeake National Historic Trail
1
Channel Islands National Park (Calif.)
1
Developing countries
1
European Union countries
1
Hawaii
1
Iraq
1
Ireland
1
Koss Cove (Alaska)
1
Lincolnshire (England)
1
New Mexico
1
Newark (England)
1
Northeastern States
1
Northern Mariana Islands
1
San Gabriel River Watershed
1
San Joaquin River Watershed
1
South Dakota
1
Spain
1
Tulare Lake Watershed
1
Tule River Indian Tribe of the Tule River Reservation, California
1