Any frequent traveller will tell you that, when you’re out and about, sourcing recommendations from locals will almost always trump whatever you can find in the guidebooks. This can be true of where to eat, what to do and how to get about. Nirvana legend Kurt Cobain clearly knew this – because, in 1993, the alt-rock icon called then-Sepultura member Max Cavalera to ask where to score drugs in Brazil.Cavalera co-founded Sepultura with his drummer…