AeroPhone - Listening Wall 2nd World War built by the Italians

You'll find this fascinating WWII-era acoustic surveillance relic built by the Italian Navy on Mount Patella, where soldiers once used primitive sound-detection technology to listen for approaching enemy aircraft. This unique listening wall represents paleolithic-era military tech even by 1940s standards, offering you a rare glimpse into pre-radar defensive systems. The site now serves as an intriguing historical attraction where you can explore the Mount Patella Telecommunications Center and imagine the tense wartime atmosphere when Italian forces relied on these concrete sound collectors to defend Leros.