There's no reason to leave Buenos Aires to experience the different cultures of the world. So many people and cultures from all around the globe have established a strong presence here... the Bolivian neighborhoods of Liniers, Chinatown in Belgrano, the Italian heritage in La Boca, and Once with its Jewish population are just some of them. There's even a Valencian community which celebrates Fallas in Buenos Aires!
I can see why so many movies and advertisements are produced in Buenos Aires. Set up the camera in a certain angle and location and you can shoot scenes representing spots from all around the world. I would have never guessed that this ad supposedly shot during the La Tomatina in Buñol was actually filmed in San Telmo!