I have mentioned it before, but the thing that impressed me the most so far is the facts that people actually travel by helicopter within the city. There are lots of heli-pads on buildings in the city and if you find yourself placed high enough to oversee a bit of the city you actually see helicopters taking of somewhere and landing elsewhere on a heli-pad. Of course this is kind of sick (someone told me that you can actually commute by helicopter from the north-zone to downtown for R$ 5000 per month (the minimum income is something like R$ 500)) but it is also poetic in al its shabby futuristic-scenarions-have-come-true glory.