limestone cave ear of dionysius orecchio di dionisio a cave with acoustics effects inside, syracuse siracusa, sicily, italy

acoustic acoustics ancient antique antiquity archeology archimedes art attraction caravaggio cave cavern dionisio dionysius dionysus ear echoes effect effects entrance europe famous geology greek heritage history holiday inside italian italy legend limestone orecchio park quarry resonance rock ruins sicilia sicilian sicily siracusa stone syracuse temenites tour tourism tourist travel unesco vacation voice