The church dedicated to the Holy Family is the greatest example of Gaudi's architectural design in Barcelona. It is an example of integrated architecture, where structure, decoration, symbolism, mysticism and nature all blend together. Gaudi's life is inherent in every stone, a life tragically cut short by a tram accident in 1926. The architect was not actually responsible for initiating the work, but his involvement reached the level of an almost limitless obsession. He designed towers dedicated to each of the twelve apostles, as well as four for the evangelists, and two more for the Madonna and Jesus. The two main façades are dedicated to the Birth and the Passion of Christ, and their stones tell a vast sculptural story of Faith, Hope and Charity. The façade of the Nativity, which Gaudi designed but did not implement, has been the subject of much controversy because of the Etsuro Sotoo sculptures which have led this façade to be known as the Japanese façade.

Gaudi's death was only the beginning of a series of misfortunes which culminated in the burning of the crypt, the workshop and some of the design models during the Civil War. La Sagrada Familia, a World Heritage monument, offers a wide range of tourist options, with a museum, exhibitions and guided tours.

Other Gaudi monuments: Güell Park, Casa Mila and casa Batllo.