Thanks for your comments. Since we will only be in Barcelona for the day we may op for a short guided excursion and then do some walking on our own. We've been to Barcelona on a tour several years ago and I've got to try and figure our what we did there (old pictures) and what we would like to see now. While the guided tours do cost more, I've found from past trips that a good guide can really make a tour worth while. Due to my advanced age
, I find it hard to walk and read at the same time.