There is really no such thing as a bad view at Iguassu Falls. If you really want to see and appreciate the falls in all their splendor, spend at least one full day covering the trails on the Argentine side. There are three well-marked main circuits that include elevated — though not daunting — catwalks. (While the longest path is about a mile, in good weather it’s relatively easy walking.)
These circuits include numerous optional stops with viewing stands, each of which seems to be an even better vista than the last. The path to Devil’s Throat takes you away from the band of falls, as its steepest drop is separate from the rest, while the Upper Circuit offers sweeping panoramas, and the Lower Circuit gets close alongside the falls and down to the river.
The Brazilian side is where you’ll get a glimpse of the greatest views. Because the majority of the falls are on the Argentine side, seeing them from Brazil allows you to take in more at once.