Travelling by bus to Curitiba

Tomorrow I'll be on a 11 hour bus ride from Porto Alegre to Curitiba. I'm voluntarily using the bus rather than the plane. Since everybody thinks I must be crazy for doing so: First, I don't really have any idea how the landscape/countryside in that area looks like. Second, I haven't really spent all too much time outside of the big Brazilian cities yet. Third, I have the time to do it (and two laptop batteries). Fourth, it's more friendly to the environment... my intercontinental flights consume way too much kerosine anyway.