Visit a refuge of animals such as the toucan, a caiman and more rescued animals. Visit is with a tour that last nearly 1:30-1:45 hours. They try to nurse them back to nature but since penalties are still almost non-existent, the trade in wildlife in Argentina continues undisturbed. The same bus to the waterfalls can stop there.
Be sure to stop by this beautiful, peaceful little garden which is full of hummingbirds. The owner has been placing feeders for wild birds for 40 years. None are in a cage. Great photo opportunities abound. There are other birds, as well, but the different types of hummingbirds that come to feed, perch and just fly around is amazing. It is a great place to sit and watch and reflect. (There are no other services inside, and advance reservations are preferred.)