I've learned a lot about this city from my students from Brazil.  The bus system is especially interesting to ride -- clean, many buses per hour, and aesthetically pleasing.  The stations are enclosed so in rain you're protected.  It is fun to imagine riding in a bus that is an effective part of the transportation network.



For more information, go to WIKI PEDIA.  I found interesting photos on the German version... (it's fun to practice another language).