Aerosmith, RATT and Whitesnake all in the same day! Monsters of Rock in São Paulo, Brazil looks amazing. The festival goes down October 19 and 20th and also features bands like Slipknot, Korn and Limp Bizkit. More information is available on the official festival website (don't worry, you can translate it).
If I had the money, I'd totally go to this show! Sounds like a great vacation for sure.