Fortunately we felt a lot better the next morning, albeit not 100%, but well enough to get up and head for the Argentine side of the Iguazú Falls.
Three surprises awaited us there – the bus fare had increased from AR$5 to AR$40, the entrance ticket now costs AR$215 (US$26 / £16 / €20) and not AR$85 as in 2010, and, worst of all, the most impressive part of the falls, the Garganta del Diablo (Devil’s Throat / Teufelsschlund) was closed – as it had been for the last two months! Poor timing on our part…
Even though, the national park still has a lot to offer and is well worth a visit –
Pumpernickel on Tour 
Glad you both are feeling better.
Did they say why part of the water falls is closed?
Thank you, Sheila! The Garganta del Diablo on the Argentinean side has been closed due the high water levels of the river. The kilometre-long walkway and the viewing platform were swept away over two months ago and it will take a while until the river drops and they can repair the structure. The national park is still impressive and my dad was very happy with the part we were still able to visit. Thanks for your interest.