The Grotto of Monte Cucco, with over 30 kilometres of galleries and a maximum depth of over 900 metres, is one of the most important subterranean cave systems in Europe and certainly one the best-known and most-studied in the world. Until recently, this natural spectacle could only be enjoyed by expert potholers. For those who wish to undertake the challenge, it involves an 800-metre descent underground, culminating in a unique sensory experience, including the sounds of dripping water slowing wearing away rock, the smell of the mountain depths, and the visual images created by the limestone formations.

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