Argentina vs Brazil
In our unbiased opinion – Argentina is the only side you really need to see. Brazil is overcrowded and nearly twice the price. Avoid the coatis and monkeys however. They’re a bit aggressive.
Seriously though, we hoped to have more fun on the Brazilian side, but we went on a cold overcast day, making the open air buses quite uncomfortable and the mist unbearable. We felt for the price you pay, most of your time is spent riding a bus through the forest than actually enjoying the falls. At least on the Argentine side, you get to ride a train and can take various strolls across natural paths. If you enjoy climbing however, the steps on the Brazilian side will make your calves happy.
Either way, look at how much water you see up close!
Puerto Iguazu
Puerto Iguazu in Argentina is a laid back town. You can easily walk it if you stay towards the center of the city. During the afternoons, most of the shops are closed for siesta, but you can ponder a few of the restaurants or sleep off the heat in your hotel room. We highly recommend the Jardin de Iguazu. We were staying with our 80-year-old abuela and were able to easily walk to town and this incredible restaurant, Ristorante La Toscana, for her birthday.
The airport is tiny. When we flew in, we noticed it was only one terminal. Half of it is under construction, but for the most part things are pretty smooth sailing. Don’t fly Norwegian however. We had a cancellation of our flight and were forced to leave a day earlier. Our 3 days became 2, but it actually wasn’t so bad. We saw everything we wanted to see, both the Argentine side (Day 1) and Brazilian (Day 2). We flew out during the evening flight, as you only need to arrive 1.5 hours before take off.