National Art Museum of Catalonia

Designed by Puig i Cadafalch, the building is a fine work of Modernism. Check the detailed photos and explanation of facade sculptures. It also has a shop that sells fine chocolate (the Amatller family made its money out of cocoa).

Barcelona's most popular and famous attraction, the Sagrada Família is a testament to Antonio Gaudi's modernist style and unlike any other church in the world. The texture and detail on the façades are intricate and incorporate forms seen in nature as much of Gaudi's work does. The inside is huge — it's estimated that it can hold 13,000 people — with vaulted ceilings and columns designed to be reminiscent of trees. The church is still under construction, but the central nave, apse and crypt are open. Seeing the Sagrada Família at night with lights on is impressive — this is the time when you understand why people say that it is built of bones.

The university has many interesting buildings, libraries and courtyards.

One of the most romantic squares in Barcelona, it hides a dark history in that it was built over the city's old cemetery. Barcelona's most famous architect, Antonio Gaudi, was on his way to visit the church there when he was run over and killed in 1928. There is a baroque church (Sant Felip Neri), a 14th-century palace and a fountain in the middle. To arrive, take the narrow street next to the cathedral cloister. The palace was moved from its original location in the street Via Laietana during the 1920s. If you look the front of the church, you can see some holes made by a civil war bomb. If you go out the square through the other street, you'll arrive to the street Baixada de Santa Eulàlia, where is said that the Barcelona's protector was tormented.

Distinctive pink house that Gaudi lived in for nearly 20 years (although not designed by him). It features furniture designed by Gaudi and other objects relating to Gaudi's life. The gift shop has a large selection of Gaudi-themed souvenirs that are generally better quality than what's available in the normal tourist shops.

Although a botanic garden had been established in Barcelona as early as 1888, the current gardens date from 1999.

Formerly known as Torre Agbar. Distinctively-shaped office tower which stands out in the Barcelona skyline. It stands out even more Friday, Saturday and Sunday nights when it is lighted in several colours. The viewing platform on the 30th floor has views in all directions. Tickets start at €15 and come with a complimentary glass of cava and access to Hyperview Barcelona, an exhibit of the city’s real-time environmental data as an audiovisual installation, which is hosted in the tower’s lowest floor.

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.

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.

Placa d'Espanya was created for the 1929 World Exhibition, on a site once used for public hangings. The fountain in the center of the square is a great attraction and plays music during the summer. Plaça Espanya is located at the base of Montjuic hill.

The main Gothic church in Barcelona. The cloister is maybe the most interesting part.

Provides a beautiful panorama view over the rest of the city. The Montjuic Castle is in the Montjuic hill. From the Montjuïc Castle, take the harbor cable car to Barceloneta for more splendid views.

One of the most unusual landmarks in this otherwise ultra-modern area is this 19th-century (finished in 1882) brick water tower. Standing 62 metres tall, it is now overshadowed by neighbouring residential, office and hotel towers and easy to miss unless you know where to look for it.