Region
America
20
Spain
11
Argentina
4
Latin America
3
Paraguay
3
Mexico
2
Peru
2
Southwestern States
2
Amazon River
1
Andes Region
1
Arctic regions
1
Buenos Aires (Argentina)
1
Colorado River (Mendoza and Neuquén-Buenos Aires, Argentina)
1
Europe
1
Florida
1
Gran Chaco
1
Northwest Passage
1
Rio de la Plata (Argentina and Uruguay)
1