Two full days in GRU
For a first-timer, what would be the best tour of Sao Paolo with two full days to spare?
Arriving early morning on day 1, followed by two full days, then leaving early morning of day 4.
Is one (or half?) day enough for a city tour? Are there places outside the city worth exploring?
(Is Sao Paolo generally safe for a single traveler? Though I think I will almost always be joining a guided tour.)