The caves were discovered in 1926 by Carlo Franchetti and were opened for tourism one year later. They belong to the "Consorzio Grotte Pastena e Collepardo". The site, situated 4.5 km out of the town of Pastena, on the road to Castro dei Volsci, is divided into 2 sections: the "active" inferior and the "fossile" superior. The second one is so named due to the fact that the process of dripping has not been active in several millennia.
Cinema
A scene of Fantozzi va in pensione, was filmed in the caves, even if in the fiction it was in Postojna Cave.