The first stop of the day, a short distance from Barcelona, is in Santa Coloma de Cervelló, where we’ll visit the crypt of the Colonia Güell, one of the works from Gaudí’s naturalist period, which the architect himself considered “a monumental model for the Sagrada Familia”, because in it he applied all the architectural innovations which we later see in his other constructions. The crypt is also part of the modernist buildings that are UNESCO World Heritage sites. An exhibition on industrial colonies, workers and Gaudí’s work can be seen in the Colony’s former cooperative building.