I love Barcelona, for many reasons and one of them is its markets and it's jamon. You can check all he info about jamon here. If you like this kind of stuff and you haven't tried jamon, you MUST, like Parma ham, but better! Anyway, Barcelona has some beautiful, colorful and very busy markets, probably the most famous one is the Boqueria, a map of colors, flavours and smells that amazes local and tourist alike, an obliged visit if you ever visit the city.
If you are a foodie you wont be disappointed.