The Big Mirror wall, Lydd, Dungeness

The Big Mirror W”all, oil 30″x30″ l0caten at Lydd, Dungoness. Built early in the last century to enable the detection of enemy aircraft coming across the English Channel. The idea being any sound is reflected to the centre of the wall where it was picked up on a microphone.It was partially successful but was superceded by the development of Radar.