A much cheaper (and still fast) way is to take suburban train to Peu del Funicular, then ride up to Vallvidrera Superior by the Vallvidrera Funicular (a free connection in Peu del Funicular train station). From there, take bus No 111 (also a free connection) to the top of the mountain.
Hospital de Sant Pau
This former hospital is an architectural masterpiece that is now open for visitors. Inpatient wards (and most outpatient facilities) have been moved to a new building of Nou Hospital, but in terms of touring the area, that makes it all the easier. One of "small hidden features" is a network of underground passages where small carriages can be seen, you can get there near WCs on a central square, between Banc de Sang and Quiròfans.
Monastery of Pedralbes
A beautiful Gothic monastery near the university, there are a museum which depicts the monastery life, a church, and a marvelous chapel covered with medieval frescoes.
Güell Pavilions
A complex of two pavilions by Antonio Gaudi. 2024 closed for renovation.
The museum has limited opening hours but the park it is situated in is also interesting. Check website before going to the museum as it will eventually relocate to The Can Bagaria building.
If you're a football fanatic, then you can't miss a visit to this football temple, the home ground for Barcelona's biggest and most popular team and one of Europe's greatest footballing 'cathedrals'. During the Franco era, FCB was the only way that oppressed Catalans could vent their anger against his dictatorship. Because of that, it became and still is a symbol of Catalan identity. Camp Nou is the biggest stadium in Europe with a capacity of 98,600 people, with shops and a museum of the club's history. Match tickets start at about €42 and games hardly ever completely sell out, unless it is a match against the hated rivals Real Madrid (a match commonly dubbed El Clásico), one of the other top teams (Atlético Madrid, Valencia or Sevilla) or in the Champions League. With the quality in the current team, there are always a few goals, and it is nearly always a resounding win for Barça. For stadium tours check the entry below.
Camp Nou Experience
Museum dedicated to the FC Barcelona. It occupies 3,500 m² and attracts 1.2 million visitors a year, ranking it second to the Museu Picasso, which attracts 1.3 million visitors, as the most visited museum in the city of Barcelona. All of the Barcas trophies and jerseys of many famous players of the team are exhibited. The museum can be visited by booking the Camp Nou Experience package, which includes also a stadium tour. The stadium tour is not fantastic and the audio guide is not really worth it either, but for a quick recent history of matches played there, consult the backs of the doors in the cubicles. Most have a lot of graffiti championing the team that played there. It is also unfortunate that the home team changing rooms are not open to the public, only the somewhat dated guest's team dressing rooms, which are not that impressive.