The Grotta dei Penitenti is another classic example of a lava flow cave on Etna on the lavas of 1892, the same that originated the Silvestri Craters. This cavity is divided into 2 parts: the uppermost part is the point where the channel was formed, more easily accessible and can be walked on foot for about 10 meters. The longest part, of which a part has been walked, is instead a very low and narrow tunnel, but still explorable by walking on all fours, almost on your knees. Due to its difficult morphology that requires a rather uncomfortable movement, it has been given the name Grotta dei Penitenti. The bottom is made up of AA type lava. Nearby there are other similar caves detected and inserted on the Open Street Maps by the same authors, among which we point out the Grotta della Volpe, included in the census and the Grotta Garbage, a small cavity in which unfortunately there are several bags and plastics, transported by the wind, from the Rifugio Sapenza.