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Secret site

The Denge Sound Mirrors

Greatstone, Kent

Giant concrete 'ears' built to hear enemy aircraft coming.

Before radar, Britain experimented with huge concrete dishes and walls designed to collect the sound of approaching aircraft engines and give early warning of an attack. The mirrors at Denge include a curved wall 61 metres long.

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When
1920s–1930s
Where
50.9500, 0.9500
Group
Secret bunkers & war sites

Visiting

Guided walks are run by the RSPB on certain days. They can be seen from a distance.

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