So Iguazu Falls.  Located in far northeastern Argentina and on the border with Brazil and Paraguay right before the junction of the rivers Iguazu and Pirana (South Americas 2nd river after the Amazon).  275 falls in all, though I lost count after 5 or so.

It is a good thing few in the US have heard of the Falls, as Disneyworld has nothing on Iguazu in terms of crowds.  The views are spectacular, if you can see over the heads of the roughly 1000 people in front of you.  But the Argentines do a great job putting you close to their sites (same at Perito Moreno Glacier).  You walk over some of the falls, immediately next to them and, if you take the boat (as I did), almost under them.  In fact, I  saw a place that rented new fiberglass barrels so you could go over them if you liked.

Pictures of course do no justice to the expanese, roar and awesomeness of the Falls-

The boat ride under the Falls was way fun.  You get so close that you cannot open your eyes due to all the spray.  Some people wear bathing suits in the boat.  But I think they should implement a new rule and not allow anyone over 40 to wear a speedo or bikini- just too much information.  Does keep your focus on the Falls though.

Also, they might think about renaming them the Falls of Narciss.  Just about everyone seemed to want a picture not so much of the Falls, but of themseleves with the Falls in the background.  They could cut down on the crowds if they just had a big picture of the falls at the entrance to the Park that people could use a backdrop for what they really want- a picture of themselves gracing the falls.  

A pic of the Devils Throat-