I realize this was posted some time ago, but I still like the Sheraton - it is directly adjacent to the park and within the park borders. While others are arriving and checking in at the park entry and boarding the train for the park, you are IN the park seeing the toucans, monkeys and parrots - which flee by the time the hoards arrive.

Ditto at closing - you are seeing it all after the folks who have to exit the park have departed. And if you get a parkside room, you have a nice view of the falls, albeit slightly distant, dawn and dusk. :-:

Sounds like Hilton has opted for a golf resort and, probably, there is no opportunity to ever build a hotel situated like the Sheraton. And, no, Hotel das Cataratas on the Brazilian side can not compare - perhaps 80% or more of the falls parkways and walkways are on the Argentine side.

Ushuaia (may the property be waling distance from Tía Elvira's restaurant, ) well, they are both still coming according to a note in this press release:

"About The Hilton Family of Hotels In Argentina
Hilton Hotels Corporation currently manages the Hilton Buenos Aires in Puerto Madero. The company will manage the Hilton Iguazú Resort scheduled to open in Iguazú Falls in late 2008, and the Hilton Ushuaia in the southernmost city of the world, scheduled to open in 2009."