For many years, as I drove through the countryside of Ciociaria, I saw signs along the roads inviting tourists and curious people to see the caves of Pastena (le grotte di Pastena), so finally I decided to see what they were all about.

The grotte, or caves, of Pastena, located in a valley deep in the Ausoni mountains in the province of Frosinone, are a natural wonder not to be missed.

The caves are part of a karst system which was formed by deposits of carbonate of calcium (salt) about 100 million years ago under a shallow sea. It emerged from underwater due to tectonic movements about 2 million years ago, during the Pleistocene era, and continues to form.