Zoom out of Madrid on Google satellite view and red clusters begin to emerge. Between grey, gridded avenues and barren parks, see clusters of winding narrow streets with red roof tiles and tiny plazas, which were once independent towns with their own culture, economy and architecture. Today, even though they lie well within the city limits of Madrid, they remain different.
Vallecas is a working-class neighbourhood with an unstoppable fire in its belly. It emerged out of a slum, only to be beaten back to the bones again by the most brutal pummelling the Spanish Civil War could give. Since then, this hard-left barrio has become a close-knit community and home to thousands of immigrants from all around the world, making it one of the most mesmerising corners of Madrid.