Last June I was in Foz do Iguaçu, Brazil for a week for the 2nd Gemini Science Meeting. In the area, the Iguaçu river borders three countries: Brazil, Argentina, Paraguay. A very large complex of falls is shared between Argentina and Brazil.
According to most, no trip to this region is complete without seeing both side of the Iguassu Falls. Therefore, on Sunday, before the start of the meeting, I joined a few colleagues in a day trip to Parque Nacional Iguazú in Argentina. We rode the bus across the border to Puerto Iguazu, and then to the park. We ended up spending the whole afternoon in the park, exploring the Upper and Lower Circuits and ending with a visit to La Garganta del Diablo. The various boardwalks take you right up to the falls, either above or at the foot of the falls. You are almost guaranteed to get wet. I have never seen so many falls, nor so many butterflies of all kinds. I have put together a photo album of the trip: Argentina – Parque Nacional Iguazú Album.