During my week in Barcelona, I walked and walked and walked.
I varied my routes in order to experience different streets because I quickly saw that the architecture is one of the most spectacular things about Barcelona. The styles are varied and somehow all make sense in this dynamic and beautiful city. People may come here for Gaudí (and yes, Gaudí is incredible), but there is so much more to experience.
The architecture feels like a significant part of the personality and vibe of the city.