Embassies & Consulates
Paraguayan Consulate Paraguayan visas cost US$65 for most nationalities but US$160 for Americans at the time of research. Visa processing takes three hours, and you'll need your passport, two photos and a copy of your credit card.
Brazilian Consulate Visa processing (Australia/USA/other AR$2400/3600/1600) takes 24 to 72 hours so visit as soon as you arrive in town. Apply online first and print out the receipt before visiting the consulate with a bank statement, a photograph with a light background and a ticket out either from Brazil or Argentina.