Since Park Güell is not situated in the center of Barcelona, most of the main tours organized in the city do not include this site. Nonetheless, there are several guided tours which focus on the park or on Gaudi’s architecture (for additional information – Attractions and Tours in Barcelona).
Additionally, you can participate on Gaudí Experiència. This is a unique interactive 4D exposition about Gaudi’s art. For the fans of Gaudi’s art, it is very recommended to visit Park Güell and the special exposition.