Im arriving in Rio next week and will be bussing it to Buenos Aires over the course of about 3 weeks. I am woefully under prepared and was wondering if anyone could recommend a few stop-offs between those two cities. I'd be massively grateful, thanks.
Definitely the Iguazu Falls (Foz de Iguazu). They are incredible and should not be missed. There is a Brazilian side and an Argentinian side. In Brazil, you get more of an overview of the entire falls, while in Argentina you are right down in the Falls themselves. I can't say for sure whether or not it is a must to see both sides, as I only hit the Argentinian side myself due to time. Any guidebook for Brazil or Argentina would have information on them.
If going along the coast, Florinapolis (sp?) is fun with alot of nice beaches.
Definitely Iguazu Falls and the natural jungle there, you can experience adventure tourism.
I agree with the about posts about Iquassu Falls. Definitely go there. You can easily spend a few days there. On the Argentine side you have better trails and walk right among lots of the falls. And from the Brazil side you get the best overall view of the falls. plus there are monkeys & exotic birds, etc..
Ive just done that trip and arrived in BA this morning. We went from Rio by bus to a realy picturesque fishing town along the coast to Sao Paulo called Paraty (about 4 hours) - it has a nice old town. We meant to go to Ilhe Grande but we didnt make the ferry - its an island with really nice beaches. You can take boats out to islands in Paraty though but the weather wast good when we were there. Then we got a bus to Sao Paulo (about 6 hours) which didnt look that nice and got a flight to Foz do Iguasu. The Brazilian side of the waterfalls I thought was way more impressive as you get to see them in the distance. Crossed over the border to Puerto Iguazu and and saw the Argentinan side - well worth it! Got a bus to Posadas (6 hours) when we got there we found out it the Argentinan winter holidays and we were lucky to get somewhere to stay but couldnt get anywhere for a second night. Not much to see in Posadas but there is a town about an hour away called San Ignacio (sp?) that is meant to be worth a look. Hopped on an overnight bus to BA (13 hours) and arrived this morning! Hope this helped!