buses in South America can be quite an experience too, in similar fashion, but great if you've always wanted to have a llama on your lap. But what the hell, go out and enjoy yourself.
Brazil, personally, I don't like Rio, but it's worth going to Iguassu falls (views from the Argentine side are slightly better), Manaus 1000 miles up the Amazon is fascinating (though you have to go a long way into the rainforest to see any wildlife), and Salvador on the coast is very pretty.