Casa Milà, better known as La Pedrera (Catalan for 'The Quarry'), is a building designed by the Catalan architect Antoni Gaudí and built during the years 1905–1910, being considered officially completed in 1912. It was built for the married couple, Rosario Segimon and Pere Milà. Rosario Segimon was the wealthy widow of José Guardiola, an Indiano, a term applied locally to the Catalans returning from the American colonies with tremendous wealth. The building is part of the UNESCO World Heritage Site "Works of Antoni Gaudí". The building is now owned by Caixa Catalunya.

Casa Batlló, is a building restored by Antoni Gaudí and Josep Maria Jujol, built in the year 1877 and remodelled in the years 1904–1906. 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 building looks very remarkable — like everything Gaudí designed, only identifiable as Modernisme or Art Nouveau in the broadest sense. The ground floor, in particular, is rather astonishing with tracery, irregular oval windows and flowing sculpted stone work. It seems that the goal of the designer was to avoid straight lines completely. Much of the façade is decorated with a mosaic made of broken ceramic tiles (trencadís) that starts in shades of golden orange moving into greenish blues. The roof is arched and was likened to the back of a dragon or dinosaur.

Casa Amatller is a historic building designed in Modernism style. This construction with its stepped gable is Puig i Cadafalch's most acclaimed creation. Casa Amatller was originally built as a residence for chocolatier Antoni Amatller.

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 with Carrer del Consell de Cent, and is one of the three important buildings of the Illa de la Discòrdia. The building was originally constructed in 1864, and was renovated beginning in 1902. Unlike many buildings constructed at the time, it was not named after its owner; rather it is named from the lions (lleó) and mulberry trees (morera) motifs in the decorations. Domènech i Montaner worked with sculptor Eusebi Arnau, Antoni Serra i Fiter for the ceramics, Lluís Brú and Mario Maragliano for the mosaics and Gaspar Homar for decoration and furniture to make the complete work. It was the residence of Cuban-Catalan photographer Pau Audouard.

Casa Calvet is a building, designed by Antoni Gaudí for a textile manufacturer which served as both a commercial property (in the basement and on the ground floor) and a residence. Gaudí scholars agree that this building is the most conventional of his works, partly because it had to be squeezed in between older structures and partly because it was sited in one of the most elegant sections of Barcelona. Columns flanking the entrance are in the form of stacked bobbins— an allusion to the family business of textile manufacture. Three sculpted heads at the top also allude to the owner: One is Sant Pere Màrtir Calvet i Carbonell (the owner's father) and two are patron saints of Vilassar, Andreu Calvet's home town.

The Palau de la Música Catalana (Palace of Catalan Music) is a concert hall designed in the Catalan modernista style by the architect Lluís Domènech i Montaner. It was built in Barcelona, Catalonia, Spain, between 1905 and 1908 for the Orfeó Català, a choral society founded in 1891 that was a leading force in the Catalan cultural movement that came to be known as the Renaixença (Catalan Rebirth). It was inaugurated February 9, 1908. The project was financed primarily by the society, but important financial contributions also were made by Barcelona's wealthy industrialists and bourgeoisie. In 1997, the Palau de la Música Catalana was declared a UNESCO World Heritage Site. Today, more than half a million people a year attend musical performances in the Palau that range from symphonic and chamber music to jazz and Cançó (Catalan song).

The Cathedral of the Holy Cross and Saint Eulalia (Catalan: Catedral de la Santa Creu i Santa Eulàli, Spanish: Catedral de la Santa Cruz y Santa Eulalia), also known as Barcelona Cathedral, is the Gothic cathedral and seat of the Archbishop of Barcelona, Spain. The cathedral was constructed throughout the 13th to 15th centuries, with the principal work done in the 14th century. The cloisters enclosing the Well of the Geese (Fuente de las Ocas) were completed about 1450. The neo-Gothic façade was constructed over the nondescript exterior that is common to Catalan churches in 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 this city.

The Columbus Monument (also known as the Monumento a Colón and Mirador de Colón in Spanish) is a 60 m tall monument for Christopher Columbus at the lower end of La Rambla, Barcelona, Spain. It was constructed for the Exposición Universal de Barcelona and is located at the site where Columbus returned to Spain after his first voyage to the Americas. The monument serves as a reminder that Barcelona is where Christopher Columbus reported to Queen Isabella and Ferdinand after Columbus' most famous trip. At the very top of the monument stands a 7.2 m tall bronze statue atop a 40 m tall Corinthian column. The statue was sculpted by Rafael Atché and is said to depict Columbus pointing towards the New World with his right hand, while holding a scroll in the left. As it was sited, instead of pointing to the west towards the New World, the statue points east towards Columbus's supposed home city of Genoa. The statue is atop a socle, on which the word "Tierra" (land) is inscribed.