With rainbows you can almost touch and the largest volume of water of any cascade in the world, Iguazú Falls is not an afterthought. It is what you organise your trip around.
Expect: Rainbows you can almost touch, falls that soak you to the skin and a Devil's Throat that makes you feel like you are being sucked into the abyss.
Pack: Waterproof, camera and plastic bag (for your camera).
It may be out of the way, tucked in the furthest corner of Argentina, but that shouldn’t matter to you because Iguazú is not an afterthought; it is one of the premises on which you base your trip. Upon seeing Iguazú, First Lady Eleanor Roosevelt reportedly sighed, “poor Niagara”; and with only Southern Africa’s Victoria Falls coming even close to the volume of water that hurtles over this collection of waterfalls, the competition (you could say) has been washed away.
The falls separates Brazil and Argentina and can, subsequently, be viewed from either side. The main towns nearest the national park, in which the falls is situated, are Puerto Igazú (in Argentina) and Foz do Iguaçu (in Brazil). I recommend that you view the falls from both sides, seriously!
It is best to visit the falls on the Brazil side first, as it has the better panoramas. Then visit the Argentine side the day after, get right up close until you can feel the power of those same falls you saw from such a distance the day before. Each side needs a day, but there is no need to move accommodation. Regular buses will take you back and forth from the falls on either side. On the Argentine side it is worth leaving the Devil’s Throat (or La Garganta del Diablo) until last. This not only helps to avoid the crowds, who mostly visit it first, but also saves the most impressive sight till last.
Puerto Iguazú is a nice enough place that offers an abundance of hostels and cafés. It is a touristy town, but a friendly one. Somewhere you wouldn’t mind relaxing for a few days, seeing the falls and lying by your hostel’s pool (oh yeah - most of the hostels have pools).