The tourist's entrance to the underground complex is situated at the bottom of the Trimpello Channel, not far from the village of Fornovolasco (Municipality of Vergemoli).
This wild and savage corner of Tuscany, where harsh geological events have given the place a varied and tortuous orographic structure, is dominated by the slender profile of Mount Pania Secca, which hovers over the valley with its vertiginous south-east slopes.

On the opposite side there is a wide karst area where karrenfeld, deep abysses, bizarre monoliths and numerous dark crevices can be seen.
 
From the 17th century to the end of the 19th century, all that was known about the cave was an air current which, channelled into a hut, was used by the inhabitants of the nearby houses of Trimpello to keep food fresh.