At the Lillet valley, and following a narrow meander of the River Llobregat near its source at the Pyrenees, the brilliant artist Antoni Gaudí created the only damp garden among the several he designed. The area has countless elements full of fantasy and imagination such as bridges, grottos, arbours, animals and fountains –all of them perfectly incorporated into nature.

The itinerary is rounded off with the visit of the spectacular Clot del Moro concrete factory, another Modernista instance of incorporating architecture into nature– in this case, an industrial building created by Rafael Guastavino, now a museum.