Sue
When I was there I did 2 half day tours from the ship. Feel like I saw more than enough. It was Nov 1st - a holiday - so many of the stores, restaurants, etc were not open so all there was to do was tour. So much from the ship is the Gaudi architecture and most passengers took those tours. It is a city where you have to be careful of pick pockets - sort like Rome. One passenger was rolled for $10,000. Now why we has carrying that much I don't know - but poof, it was gone!! I know there are several on this board that absolutely love Barcelona so hopefully you can get better information from them.