I worked for 3 months in a building that is now a museum to his creations: http://www.cliquearquitetura.com.br/portal/blog/view/mon-mus... It basically looks like the scenery from "The Jetsons" cartoons/series. It is cool from the outside but is an horrible place to be inside the whole day.
It's official name was "Castelo Branco" (white castle) but everyone called it "white elephant".
What made it beautiful is that it looks like a white slab floating over a field with a rain forest park behind. What made it atrocious is that the thing had no windows or ventilation, bad water drainage and it is in the middle of the rain forest region: hot, humid and moldy; the perfect breeding place for respiratory diseases. Most people would work very little time there before leaving to treat allergies, flu, pneumonia and even tuberculosis.