The Grotta del Vento is located in the center of the Natural Park of the Apuan Alps, under Mount Pania Secca in the municipality of Fabbriche di Vergemoli, in the province of Lucca (Tuscany).
From the Apuan Excursions website. Locally Buca dell’Omo Salvatico. It is located in the municipality of Stazzema, ten minutes from the Del Freo refuge, along path 128 for Puntato and …
They say that from this cave Spallanzani succeeded in discovering how the springs of the rivers are formed. Previously it was thought that the rivers formed from the evaporation of the underground strata