Barcelona in 3 days

Poble Español is an artificial recreation of the different regions of Spain. I went there once in 1989, and found it of mild interest. I don't believe it has changed much. With an amazing (and real) city outside the walls of this recreated village, I know where I would rather explore.

Thanks a bunch, may be that is why Rick Steve doesn't recommend much.
What would you do if you go to Barcelona for 3 days?

I tend to favour 3 days spent like this ...
Day 1 - Passeig de Gracia, Ramblas & Bari Gotico
Day 2 - Sagrada Familia, El Born & Barceloneta
Day 3 - Park Guell & Montjuic

Thanks a bunch.

Excuse if I don't give a personal opinion, I (almost) never do in the forums as this sort of decisions are very personal since it depends on your tastes and expectations which might differ from mine.

So, for a bit of background instead:

During the late 19th and early 20th century, international exhibitions were something very popular, especially in Europe and the US. It was a way to show the world the ingenuity and might of one's nation where all sort of new products, inventions, and other gadgets/solutions were presented. Many were celebrated (in Chicago, London, Paris...) and Barcelona did so too twice, once in 1888 and again in 1929. It was "customary" to build great feats of architecture for those exhibitions many of which were temporary and were dismantled after the event, which normally lasted for several weeks. But much like today's policy in many cities hosting the Olympic Games, some chose to prolong the life of such constructions beyond the exhibition. That was the case for today's Barcelona Pavilion which hosts the Mies Van der Rohe Foundation and Art Museum, the Arc de Triomf located near Parc de la Ciutadella or the Poble Espanyol (Spanish Village). The aim of the later was to show visitors a sample of the different architecture styles across the Iberian Peninsula, which differ greatly.

The Poble Espanyol was conceived for the 1929 International Exhibition by famous architect Puig i Cadafalch (also the architect for Casa Amatller, Fàbrica Casaramona or Casa Macaya among other) and later conceived as a whole unit by the architects Francesc Folguera and Ramón Reventós. It offers the visitor a taste of different styles of architecture reproducing 117 different full-scale replicas of buildings across Iberia, from the pazos of Galicia to the Mudejar style of the Torre de Utebo (Zaragoza) to the impressive Puerta de San Vicente (Ávila) while walking in narrow streets and back-alleys creating a very especial ambiance. While the buildings themselves are not visitable many artisans present their art and craftsmanship in the small stores located at the street level of those buildings. Coupled with a variety of restaurants and the fact concerts and other events are often celebrated in the main square of this quaint village, today Poble Espanyol is sort of a "thematic" park for those interested in architecture and their families alike.

Poble Espanyol is located in the so-called Parc de Montjuïc and area of the city located in one of the hills which is full of parks and gardens and museums as well as the Magic Fountain. The base of the hill is easily reachable by bus/metro from anywhere in the city and there are bus lines crisscrossing the hill.

Website for Poble Espanyol: https://www.poble-espanyol.com/en/monuments-and-buildings