Region
United States
West (U.S.)
47
Mexico
42
Texas
34
Canada
31
Mississippi River Valley
22
California
16
Mississippi River
16
Missouri
15
Louisiana
14
Southwest, New
12
Spain
10
Colorado River (Colo.-Mexico)
9
Rocky Mountains
9
Northwest, Old
8
Great Britain
7
Oregon
7
Alaska
6
Iowa
6
Kansas
6
North America
6
Ohio River Valley
6
Southwest, Old
6
Utah
6
West Indies
6
Colorado
5
Florida
5
Minnesota
5
Montana
5
Nebraska
5
New York (State)
5
Ohio River
5
America
4
New Mexico
4
Pacific States
4
Southern States
4
Arkansas
3
Dakota Territory
3
Great Lakes (North America)
3
New France
3
New Orleans (La.)
3
Northwest boundary of the United States
3
Northwestern States
3
Pacific Ocean
3
Red River (Tex.-La.)
3
Saint Louis (Mo.)
3
San Juan Islands (Wash.)
3
Santa Fe National Historic Trail
3
Yellowstone National Park
3
Yellowstone River
3
more ...