Hi, See http://www.bbc.co.uk/news/uk-england-tyne-33059534 Quote "A "forgotten" piece of history which protected Sunderland from Zeppelin...
Between Folkestone and Dover on the cliffs is a Sound Mirror (or Acoustic Early Warning System to give it is proper name). Short lived, but...
In the 1920s the British military used these vast concrete parabolic 'sound-mirrors' to detect approaching aircraft. The 'Listening Ears' at Denge...
Hi Everybody I was down below the White Cliffs of Dover at Samphire Hoe today looking up at the gun emplacements and felt that I must start...
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