Everyone arrives in Barcelona having already seen it: Gaudí's roofs are on a thousand postcards. What the postcards skip is how much city there is around them. The Romans founded a colony called Barcino on the hill where the cathedral stands, and from the 1850s the city broke out of its walls into the grid of the Eixample, where the Modernistas had the money and the nerve to build anything. The 1929 Exposition left Montjuïc its palaces and a fountain, and the 1992 Olympics opened the city to the sea.
It is also one of the most visited cities in Europe, and that shapes the trip. Every Gaudí building sells timed tickets, and the best slots sell out days ahead. Many residents are tired of the crowds and the housing costs: thousands marched against mass tourism in July 2024, and the city plans to end tourist-apartment licenses by 2028. The city is also cutting visitor numbers at Park Güell. Expect the odd tourists go home sticker, not hostility; this plan spreads you across several neighborhoods. A good trip is half planning, which is the honest reason for five days: one or two big sights a day instead of four, meals at Catalan hours, and time for a vermouth before lunch.
The plan keeps each day in one part of town. Day one is the Gothic Quarter and El Born, day two the Sagrada Família and the Eixample, day three Montjuïc, day four a day trip to Montserrat, and day five Gràcia, Park Güell and the beach. Start on a Tuesday if you can: the Picasso Museum, MNAC and the Miró Foundation are closed on Mondays, the big markets are closed on Sundays, and the Magic Fountain runs on Thursdays to Saturdays in autumn. Barcelona is also the easiest way into Spain and Catalonia, and it pairs well with Valencia by train, Mallorca by a short flight, or the Pyrenean mountain state of Andorra by coach. Choosing between Barcelona and Madrid? See Madrid vs Barcelona.