Many people know about the famous Sagrada Familia, but did you know that Gaudí developed some of its groundbreaking design ideas through his work on Colonia Güell?
Located just outside Barcelona, Colonia Güell is an unfinished crypt where Gaudí experimented with innovative architectural techniques.
Here, he used a small-scale version of his signature catenary arches and organic forms, which later defined the Sagrada Familia.