Region
Arizona
4
Arizone
1
Beale Road
2
Boston
1
California
4
Colorado Plateau
1
Ghost Ranch (Abiquiu, N.M.)
1
Massachusetts
1
Mexican-American Border Region
2
Mexico
3
Mexico, North
1
New Mexico
1
North America
1
San Diego
1
Santa Fe National Historic Trail
1
Southwest, New
28
Southwestern States
1
Tombstone
1
United States
4