An interesting fact - Iguazu currently has the second-greatest average annual flow of any waterfall in the world, after Niagara. One would think the more rain upriver would create more spectacular flow - but it actually raises the river level below the falls subsequently shortening the distance for the water to fall...making the falls "smaller"
Ps - if you look down in to the falls in this pic you can see lots of small dots. These are not camera dust but in fact flocks of birds swirling around in the eddies of wind within the Devils Throat.
It was incredibly hard to photograph because of all the spray rushing back up in the air. I was able to only take fast shutter speed shots otherwise the lens was covered in water after a second or two.