Time Out says
It's the culmination of months of work: the streets of the Gràcia district are transformed into elaborate creations for the annual neighbourhood festival. Local residents use recycled materials, papier-mâché and oodles of imagination as some 25 associations compete for the title of best-decorated street. Last year's winner was a Japanese garden with a gigantic dragon, a sumo giant and thousands of coloured streamers, while runners-up included Paris in the 1940s, a fairground, radioactive mutants, and steampunk fantasies. The party lasts all week, with visitors from across the city attracted by the decorations, live music until late in the district's squares, and food, drink and family activities during the day.