Street Art Down the Sewer
From the inventive minds of Sao Paulo street artists..."for at least a year, a few enterprising young artists who post under the Fotolog name 6emeia have been beautifying the city’s storm sewer openings with their cute and clever cartoon paintings"... Street SmArt

More at 6emeia's official site and Brasile, Tombini d'Artista

The Architecture of Sao Paulo
Sao Paulo's "Prehistoric" Grafitti

Images via 6emeia's Flickr site