Are you planning to travel to Iguazu Falls?
Or travelling to other parts of Brazil, Argentine or Paraguay.
First! Check your papers and the requirements for it country.
This post can help you to find the links with all the informations …
You can get some informations at http://embassy-finder.com/ , but the must important is check the informations with the oficials embassies.
If you don´t find you can email me to help you!
Travelling to Argentine
Before travel to Argentina check the list of visas requirement to travel to Argentina, see at this link: List of visa require for Argentine
Travelling to Paraguay
The following information on entry and exit requirements can be obtained from the Paraguayan authorities. However, these requirements are subject to change at any time.
For specials situations you can get a transit visa at the Paraguaian border control area, the transit visa is only for 72 hours and cost U$50 , the payment must be in cash.
More information of news agreements: Acuerdos de Supresion de Visas
Travelling to Brazil
After this date, June 16, 2019, U.S. , Canadian, Australian and Japonese citizens do not need a visa if they are traveling to Brazil for tourism, business, transit, artistic or sport activities, with no intention of establishing residence.