The Park Guell is a 17, 18 ha wide garden complex with architectural elements situated on the hill of el Carmel in the Gràcia district of Barcelona, Catalonia. It was designed by the Catalan architect Antoni Gaudí and built in the years 1900 to 1914. It is part of the UNESCO World Heritage Site "Works of Antoni Gaudí". The park was originally part of a commercially unsuccessful housing site, the idea of Count Eusebi de Güell, whom the park was named after. It was inspired by the English garden city movement; hence the original English name Park.

The Cathedral of Santa Eulàlia (also called La Seu) is the Gothic cathedral seat of the Roman Catholic Archbishop of Barcelona, Catalonia (Though sometimes inaccurately so called, the famous Sagrada Família is not a cathedral). The cathedral was constructed throughout the 13th to 15th centuries on top of a former Visigothic church. The Gothic-like façade is from the 19th century. The cathedral is dedicated to Eulalia of Barcelona, co-patron saint of Barcelona, a young virgin who, according to Catholic tradition, suffered martyrdom during Roman times in Barcelona.

Founded in 1847 on Barcelona's La Rambla, the Gran Teatre del Liceu is an opera house that has retained its role as a culture and arts centre throughout its history and one that represents one of the symbols of the city. Today, it is a publicly-owned theatre – by the Catalan Regional Government, Barcelona City Council, Barcelona Provincial Council and the Ministry of Culture – under the administration of the Fundació del Gran Teatre del Liceu, which, besides the above institutions, incorporates the Patronage Committee and the old Societat del Gran Teatre del Liceu.

The Casa Milà, better known as La Pedrera (Catalan for 'The Quarry'), is a building designed by the architect Antoni Gaudí and built during the years 1905–1910, being considered officially completed in 1912. It is located at 92, Passeig de Gràcia in the Eixample district of Barcelona. Hosts a large exposition of Gaudi works, covering Sagrada Familia and Casa Batlio, not only La Pedrera itself. The exposition is a good place to start your exploration of Gaudi; it reveals many hidden details for the art novice.

The Casa Batllo is a building restored by Antoni Gaudí and Josep Maria Jujol, built in the year 1877 and remodelled in the years 1905–1907; located at 43, Passeig de Gràcia, part of the Illa de la Discòrdia in the Eixample district of Barcelona, Catalonia. The local name for the building is Casa dels ossos (House of Bones), and indeed it does have a visceral, skeletal organic quality. It was originally designed for a middle-class family and situated in a prosperous district of Barcelona.

The Barcelona Rambla is a street in central Barcelona, popular with both tourists and locals alike. A 1.2 kilometer-long tree-lined pedestrian mall in the Barri Gòtic, it connects Plaça Catalunya in the center with the Christopher Columbus monument at Port Vell. La Rambla can be considered a series of shorter streets, each differently named, hence the plural forms Las Ramblas (Spanish) and les Rambles (Catalan).

The old harbour, Barcelona's Port Vell, which stretches from the Columbus Monument to the Barceloneta, offers endless possibilities to enjoy your leisure time, such as Imax, Aquàrium or Maremàgnum, amongst others. Following a long historic process, the Port Vell, with its landmark buildings and monuments, now gleams like one of the most valuable pearls on the Mediterranean coast.

The Palau de la Musica Catalana (Palace of Music), opened in 1908, is one of the most important works of Barcelona art nouveau. The architect commissioned for the job was Lluis Domenech i Montaner, one of the greatest exponents of Catalan Modernismo. The construction, decorated with scultures, mosaics and stained glass by the finest artists and artisans of the time, is perhaps the best example of the synthesis between architecture and decorative arts that characterised this artistic movement.

The Basilica de Santa Maria del Mar is one of the most representative examples of Catalan Gothic architecture, it features a sombre but beautiful interior. The upsweeping verticality and lightness of the interior are especially surprising considering the blocky exterior surfaces. Built between 1329 and 1383, it was once was home to a Christian cult in the late 3rd century. The church is dedicated to Saint Mary of the Sea, since the quarter where is located (Born) was dedicated to the jobs related to the sea.

The Museu Picasso (Picasso Museum) has one of the most extensive collections of artworks by the 20th century Spanish artist Pablo Picasso. This is one of the most popular and most visited museums in Barcelona. The museum is housed in five adjoining medieval palaces in Barcelona's La Ribera. The original idea for the museum came from Picasso’s lifelong friend, Jaume Sabartés. Picasso had given Sabartés great many paintings, drawings and prints during the course of their friendship.

The most well-known public market in the city is the Mercat de Sant Josep de la Boqueria, or simply La Boqueria. Located along the La Rambla, Barcelona in the heart of the city, It is both a tourist attraction and a functioning food market. The market consists of a series of open sheds, built in 1853 under the direction of architect Mas Vila. Though the building dates from the 19th Century, a market has existed in the same location since the 12th Century.

The Sant Jaume Square has been the political hub since the Roman era. This square has been witness to some of the most important events in recent Catalan history, such as the proclamation of the Catalan State in 1931. At one end there is the Palace of the Generalitat (the government of the Autonomous Community of Catalunya) and on the other stands the City Hall. Both are Gothic buildings, although their fronts are newer (the Generalitat'sis best example of the Barcelona's Renaissance art).

The Barcelona Pavilion, designed by Ludwig Mies van der Rohe, was the German Pavilion for the 1929 International Exposition in Barcelona, Spain. This building was used for the official opening of the German section of the exhibition. It was an important building in the history of modern architecture, known for its simple form and extravagant materials, such as marble and travertine. Several critics and historians have declared it "the most beautiful building of the century".

The Museu Frederic Mares is a unique collecting museum that preserves the collections assembled by its founder, sculptor Frederic Marès (1893-1991), which came to form part of the patrimony of the city of Barcelona through his donation in 1946. Two years later, this museum was inaugurated in a part of the old Royal Palace of the Counts of Barcelona in the heart of the Gothic Quarter. Its original Verger or courtyard garden, still remains intact.

The Centre de Cultura Contemporània de Barcelona is a museum adjacent to the Barcelona Museum of Contemporary Art (MACBA). The building is a mixture of old and new styles, dating from the early 18th century up to recent renovation of a facade in the Plaça de les Dones. The centre, one of the most visited museums in Barcelona, hosts temporary exhibitions, a cinema, concerts and other cultural events.

The Poble Espanyol was built in 1929 for the Barcelona International Exhibition as the pavilion dedicated to art. It is one of the few monuments that belonged to an International Exhibition that can still be visited. From the beginning, it was conceived as a real "village" in the middle of a city, with a surface area of 49,000 m2. The aim was to give an idea of what might be an "ideal model" of a Spanish village containing the main characteristics of all towns and villages in the peninsula.

The Museu Nacional d'Art de Catalunya is a museum of Catalan visual art located in the Palau Nacional, built for the 1929 World's Fair. Situated on the Montjuïc hill at the end of Avinguda de la Reina Maria Cristina, it was rehabilitated for the 1992 Summer Olympics. The museum was located in this building in 1990, when the Catalonian Museum Law reunited the collections of the former Museu d'Art de Catalunya and the Museu d'Art Modern, and declared it the national museum. The new museum thus combined Romanesque, Gothic, Renaissance, Baroque and the 19th and 20th century art collections.

The Casa Vicens is a family residence in Barcelona, designed by Antoni Gaudí and built for industrialist Manuel Vicens. It was Gaudí's first important work. It was added to the UNESCO World Heritage Site "Works of Antoni Gaudí" in 2005. It was built in the period 1883-1889 and is located at Carrer de les Carolines 24, in the Gràcia district of Barcelona. The site was small (smaller today after the widening of the street) compared to similar structures in the area.

The Palau Güell is a town mansion (translated literally a "palace") in Barcelona, designed by the Catalan architect Antoni Gaudí for the Catalan industrial tycoon Eusebi Güell. It is part of the UNESCO World Heritage Site "Works of Antoni Gaudí". The home is centered on a main room for entertaining high society guests. Guests entered the home in horse drawn carriages through the front iron gates, which featured a parabolic arch and intricate patterns of forged iron-work resembling seaweed and in some parts a horsewhip.

The Plaça Reial, next to La Rambla is famous for the nightlife and the uniform architecture. It is considered to be one of the most beautiful squares in the world. It was build during the XIX century in the place of a monastery, after the Mendizábal law expelled the monks. A new square was built, making all the buildings look the same, with fountains and palm trees. After some years, Antoni Gaudí, the famous architect, designed the streetlights which are still there.

The Plaça del Rei, a square next to the Cathedral, is known because has two important buildings, the Santa Àgata church, where the kings from the Aragon crown had baptism. Is possible to visit it. The other building has the Saló del Tinell, one of the best civil Gothic architecture examples. Is the place where the royal receptions where held, so is very wide with a wooden ceiling hold by the typical Catalan Gothic arches. It has also a tower from which you can have a good view of the old town. An entrance is needed to visit both.

The Plaça Sant Felip Neri, one of the most romantic squares in Barelona, 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's a baroque church (Sant Felip Neri), a XVI 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 20's.

The Casa Amatller is a building in the Modernisme style in Barcelona, designed by Josep Puig i Cadafalch. Along with Casa Batlló and Casa Lleó-Morera, it makes up the three most important buildings in Barcelona's famous Illa de la Discòrdia ("Block of Discord"), noted for its unique modernist buildings. The building was originally designed as a residence for chocolatier Antoni Amatller and was constructed between 1898 and 1900.

The Casa Lleó Morera is a building designed by noted modernisme architect Lluís Domènech i Montaner, located at Passeig de Gràcia 35 in the Eixample district of Barcelona. The building is located on the corner of Carrer del Consell de Cent, and is one of the three important buildings of Barcelona's Illa de la Discòrdia ("Block of Discord"). The building was originally constructed in 1864, and was renovated beginning in 1902.

The Hospital de Sant Pau (Hospital of the Holy Cross and Saint Paul) in the neighborhood of El Guinardó, Barcelona, is a complex built between 1901 and 1930, designed by the Catalan modernist architect Lluís Domènech i Montaner. Together with Palau de la Música Catalana, it is a UNESCO World Heritage Site. It was a fully functioning hospital until June 2009, it is currently undergoing restoration for use as a museum and cultural center. As of December 2009 there are still tours of the hospital being given several times a day.