The Colònia Güell Crypt, designed by Antoni Gaudí, is a key work in the evolution of his oeuvre and an essential visit to understand his innovative techniques. Promoted by the Count of Güell in Santa Coloma de Cervelló as part of an industrial colony near Barcelona, the crypt shows Gaudí’s pioneering use of catenary arches, organic forms and experimental materials, which would later influence his masterpiece, the Sagrada Família. The structure blends harmoniously with nature, reflecting his deep connection with natural forms. A visit to the crypt offers a unique insight into Gaudí’s creative process and his visionary approach to architecture.