Gràcia is not a touristy section of Barcelona. Nevertheless, it's certainly worth the visit if you enjoy strolling around quaint strees and want to escape the "big city" feel for a small town, alternative vibe. 
The Plaça del Sol, Plaça de Rius i Taulet and Plaça de la Virreina are vibrant centers of activity and good places to look for outdoor food and drink.
Just west of Plaça del Sol you'll find the Mercat de la Libertat, a beautiful modernista market designed by Antoni Gaudí's assistant.
Most visitors only head up towards Gràcia to see Parc Guell, which is well worth the visit. Designed by Antoni Gaudí as a wealthy living community, the project failed and was converted into a public park. It's located at about a 10-15 minute walk north from the center of Gràcia. See more about Parc Guell on the Barcelona Parks page.
