Green iguana comes from South America and some parts of North and Central America where usually live high in the trees in the rain forest. Green iguanas can also be found in the wild in the United States as a result of the pets that are returned or escape back into the wild.Green iguana comes from South America and some parts of North and Central America where usually live high in the trees in the rain forest. Green iguanas can also be found in the wild in the United States as a result of the pets that are returned or escape back into the wild.