In the volcanic Natural Park of La Garrotxa in Les Preses, near Olot, there is a unique place: a sea of rocks that is the product of the basaltic mass of the Croscat volcano and the result of man's hard struggle to own a piece of land to harvest. A fertile terrain in which the plots were gradually levelled and the stones removed to be used later in broad walls, mounds and sheds. The project aims to recover the place cleaning it of weeds and undergrowth, strengthening its rough character through the sight of the accumulated stones and suggesting an itinerary that permits discovering the park little by little. A series of signs or the vegetation itself show landmarks, forks and frames along the path. The most marked intervention is located, however, in the access to the precinct. A series of grooves, traced between the volcanic stone by discontinuous walls of Corten steel sheet, creates an initiation path of ridged triangular geometry.