Iguacu Falls are located on the Argentinian side and Brazilian. The river is the border for the two countries. The falls should be over 2700 metres in width. The amount of single falls changes cause of the rain period brings a lot more water. That's much of the information that I can remember from my trip there. Altough I didn't see any animals. Only tucans and butterflies. All the pussy cats were in the woods and didn't want to disturb them :) The park itself is beautiful and these falls are amazing! 

Adrianopolis
Angra dos reis
Balneario Camboriu
Barra de Tijuca
Barretos
Belem
Belo horizonte
Brasilia
Brotas
Campina Grande
Campinas
Congonhas
Corumbá
Cuiaba
Curitiba
Diamantina
Fernando de Noronha Island
Florianopolis
Fortaleza
Garca
Goiania
Guaruja
Ibirapuera Park
Iguacu falls
Ilha do Mel
Ilhabela
Jaboatao dos Guararapes
Japiim
Joao pessoa
Joinville
Manaus
Mariana
Natal
Niteroi
Nova Friburgo
Olinda
Ouro preto
Pantanal
Paraty
Patos de Minas
Petropolis
Pipa
Porto alegre
Porto Seguro
Recife
Ribeirao Preto
Rio de Janeiro
Salvador
Santos
Sao Jose dos Campos
Sao Luis
Teresopolis
Tiradentes
Vila velha