Who goes for staircases hunt when visiting a city? Well I can tell you, if you don’t you’re missing a lot.
Sometimes you need to be prepared and know where the coolest and most unique are located (and really often they are hidden in residential or private buildings) but sometimes they are part of a museum or a shopping centre so can be easily accessible for everyone.
Personally, I always look for them when I plan things and places I want to see before I leave for my destination. And these are things that you can’t find in any travel guide so it can be a bit tricky.
So I guess you can read this as staircases-travel-guide for Barcelona, Spain.