Mercat de La llibertat
This is my favorite market in the whole city, and the best one if you want buy food for a fair price. The neighborhood is full of young people, which gives the place a very nice vibe. A highlight of the market for me is the fishermen who, at the same counter where they sell the fish, can also cook it for you in a sort of pop-up restaurant. Just stand at the counter (there are no tables) and order the clams and any fresh fish that catches your eye.