Speleological excursion to the "Borna Grande" of Pugnetto, the longest cave in Italy in the Calcescisti, a real gem of the Lanzo Valleys. Two-hour excursion in complete safety, thanks to the professionalism of Explora's guides, who in accompanying you will provide details on the geological formation of the site and the life forms present in it. Appropriate clothing and footwear are required for a rough route, with a temperature of 12°; helmet and lighting provided by the organisation. Reservation required.