If I could relive a moment of my life, I am pretty sure this moment would be the vertigo on top of the Garganta del Diablo, feeling that earth is literally breaking under my feet into an extraordinary jump of water. You are such a small thing compared to the river and the rocks and the indistinct vapor and the overwhelming noise.
I have to admit, the attraction to nature is so strong that you really feel like you want to jump into that vapor and become part of that energy and noise and power. This is the place where paradise and hell meet. They are indissolubly tied together and split.
Once inside the national park, by taking a small train you get to a nice walking path on the Rio do Iguazù. At some point you will start hearing a light rustle. You continue walking and the rustle becomes a clang, and vapor starts to raise at the horizon. When you get to the platform that overlooks the Garganta do Diablo, you realize you are actually standing on top the Falls in a panoramic view that is thrilling and scary and exciting.
The rest of the park is a beautiful walk inside the forest, going from one waterfall to another, like the Salto dos Hermanas and the Salto Bossetti. Most of them have a small platform underneath which allows visitors to take a water shower and enjoy the power of nature.
Brazilian sideThis side is good to look at the impressive Garganta do Diablo from the bottom, so I think it is better as a second day excursion.
National Park of Iguazù
This park not only is extraordinary for the multitude of water falls, but also for the variety of animals and vegetation. It is not rare to spot tucanos, crocodiles, colorful birds, and the cute-but-aggressive coatis (never feed them!).
It is easy to stay overnight in this small village on the argentinian side of the falls. It is cheap, everything is at a walking distance, and the flights from Argentina are cheaper if arriving in this small airport. From the airport a small bus offers tourists a door-to-door service to any of their booked hotels. At the central station, buses depart everyday towards the National Park of Iguazù, either on the argentinian on the the brazilian side. Better to catch a very early bus to get the most out of this amazing experience.