The Ear of Dionysius.
Legend has it that Dionysius, the ruler of ancient Siracusa would eavesdrop on the prisoners who were incarcerated here. The cave, which was carved out of the limestone hill, is shaped similar to a human ear and because of its shape, it has excellent acoustics, which allowed Dionysius the ability to eavesdrop. The cave measures 23 meters high, 65 meters deep