What I'm interested in is meeting local people, hearing stories about weird customs and simply walking around looking for markets, small restaurants or street art. The problem is, that it's not that easy to always meet the locals, who are willing to tell me their stories or to show me their neighbourhoods. I guess, they also have something else to do.
Therefore, I was hooked right away when I heard about the Free Original Barcelona Alternative Tour. These guys specialise in street art and Catalunyan culture, which they will show you in the neighbourhood of le Raval.