Here's a tourist map that you can use for getting a better overivew of the Barcelona as a city. It contains all important tourist points of interests like Gaudi's buildings, all the best restaurants, shops, viewpoints, beaches or parks. Just play with the map and you;ll find what you're looking for.
You can surf the map below using the appropriate arrows (top left) and clicking on the plus (+) or minus (-) symbols to get a more or less detailed view.