Barcelona Must See Sites & travel tips. Barcelona, Spain's second-largest city, is inextricably linked to the architecture of Antoni Gaudi. His most famous and unfinished masterpiece, La Sagrada Familia, is the emblem of the city. We share travel tips an
3 Perfect Days in Barcelona: The Ultimate Itinerary. How to spend three days in Barcelona-see Gaudi's incredible architecture, explore the historic Gothic District, hit the beach, and more with these essential tips for visiting Barcelona!