We arrived yesterday and spent most of the afternoon and all today visiting various places and generally walking around ( today we walked almost 16 kms)!
The sello is available at the Cathedral, but we could only get it after the 11 o'clock Mass. There is no information posted. You have to hope to find someone.
Our of curiousity, we decided to try and follow the yellow arrows, starting at the Cathedral and our first attempt was a failure! We tried again later in the day and, although there was one "blind spot" with no visible arrow, after walking in what we felt might be the correct direction, we then spotted one. Shortly further on, there was again a doubtful situation, which again called for intuition. In other words, a treasure hunt. We only walked a couple of kms from the Cathedral, but frankly, you really need your wits about you!
Tomorrow we will take the Coastal route out of town.