Considering the Guitart Grand Passage in Barcelona?
A VT member wrote the following comment about visiting Barcelona:
Winding back roads of the Gothic Quarter by surferob
For a great, get lost without worrying type of ramble, try the myriad of streets between Via Laietana and La Rambla (aka Las Ramblas). You can start with a quick tour of the old Cathedral on the Laietana side and then just head west toward La Rambla from there. Don't go in a straight line, follow the twists and turns of the awkwardly linked streets and alleys. All will be filled with locals, tourists, shops, vespas, cafes and any number of other temptations.