A research project and workshop on the reuse of residual urban spaces in central São Paulo, Lixurbana documented favourite street soccer sites, DIY playgrounds, and hangout spots that had been “constructed” under overpasses and in vacant lots. The data is presented as a Wikimap website, allowing outsiders to interact with the informal community that uses the spaces. Basurama was formed in 2002 at the Madrid School of Architecture. The collective works in Europe, the United States, and South America.