These are active volcanoes emitting gas and mud, and sometimes assuming an explosive character. In various parts of Sicily, these phenomena exist, but these of Aragona are certainly the most impressive. Needless to say, there have been legends and suggestions over time, ever since Plato, Aristotle and Diodorus of Sicily… as well as the Romans who used mud for thermal purposes. The hill of volcanoes is very special. It looks like clayey, bare land, whitish to dark gray, from which rise a series of small cold mud volcanoes, about one meter high, formed by the continuous release of clay from the ground. Methane escapes from them.
It is a particular phenomenon called geological sedimentary volcanism that manifests itself when there is a lot of pressure from the build up of gases (such as methane) and clay earth below.
The small ponds that form in the rainy season are populated by green frog and discoglosso painting (Discoglossus pictus).