Region
United States
440
Mexican-American Border Region
57
Mexico
28
Central America
16
Canada
9
North America
6
Canadian-American Border Region
4
Northern boundary of the United States
3
Southern boundary of the United States
3
Western Hemisphere
3
California
2
China
2
New Mexico
2
New York (State)
2
Arizona
1
Bisbee
1
Europe
1
Montana
1
Organ Mountains Wilderness (N.M.)
1
Rio Grande Valley (Colo.-Mexico and Tex.)
1
Texas
1