Interesting two-hour speleological excursion to the "Borna Grande" in Pugnetto, the longest calcareous schist cave in Italia, a pearl of the Lanzo Valleys: activity guaranteed in complete safety, thanks to the professionalism of the guides of the Explora Speleological Group. Participants are required to wear clothing and footwear that is suitable for a rough path, in a temperature of 12°; helmet and lighting provided by the organization. Booking required.