"Fundació Joan Miró" it's my favorite museum in Barcelona.
They do beautiful & interesting exhibitions, but what really mesmerizes me is their architecture by Josep Lluís Sert.
It's located at Montjuic mountain but very close to city center, so you can breathe clean air and enjoy art master pieces.
The shop and bookstore it's also a place where I can spend many hours.
This nearly 200-year-old bar— reputedly the oldest in Barcelona, is an absynthe bar. Was one of the locations from Vicky Christina Barcelona's film.
The Marsella is one of those places that Hemingway supposedly loved to frequent (Hemingway being to bars in Spain what George Washington is to inns in New England).