The scale of Foz do Iguacu is SO huge, that sometimes you just have to zoom in to get something more on a human scale. This is a small waterfall that is insignificant on the scale of the whole area, but is still scenic in its small way.
I'm glad you showed us this small portion of the waterfall. You're right, it lends more of a mentally comfortable picture than the enormity of the whole (not that that isn't breathtaking). This is a lovely shot.