Border crossing in Iguassu Falls are open 24 hours

Iguazu borders between Brazil and Argentina
To visit both sides of the falls, one must cross the borders between Argentina and Brazil and stamp the passports.  If one is on a tour or uses organized transportation, like taxi or travel companies. They will need to make a passenger list to cross the borders, this is mandatory. 

People from USA, Canadians and Australians need VISA to visit the Brazil side of the falls. 
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The passports at the Argentine border are not stamped anymore, they only pass it through the scanner. 

Borders between Brazil and Paraguay
To enter Paraguay and travel further one needs to stamp the passport at the border and show the yellow fever card (no need any more to fill in the healthy declaration)

​For people that visit ONLY Ciudad del Este city, they don't require anything. People usually go to Paraguay for shopping because of the duty-free market. There is also a big street market. 
There is a small waterfall called Monday falls near Puerto Franco town. One can also visit the Itaipu Dam from the Paraguayan side, we suggest one to do it on the Brazil side on the panoramic buses. 

​For people traveling in Argentina, it is better to cash dollars on the blue dollar rate. Bring the new blue dollar crisp bills. They give a poor rate for 50, 20, 10 and 5 bills. The bills must be in excellent condition. They do not accept old bills. 

Sometimes it is convenient to pay for bills using a credit card. 

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