The Hythe Sound Mirror is located in an area known as The Roughs and is an example of unique warning systems. The acoustic mirrors were built on the south and northeast coasts of England between about 1916 and the 1930s, and were intended to provide early warning of incoming enemy aircraft in World War II. This one is fenced off but you can still get close to it. There are also ruins nearby of another one that has not survived as well.

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