Follow the brown signs
![uk](http://www.followthebrownsigns.com/wp-content/themes/satoshi/images/uk.png)
![twitter](http://www.followthebrownsigns.com/wp-content/themes/satoshi/images/twitter.png)
![facebook](http://www.followthebrownsigns.com/wp-content/themes/satoshi/images/facebook.png)
Sound Mirrors
Entrance is FREE!
At the back of Lade Pit are the three Listening Devices built in the 1920s and 30s as part of a national early warning system against enemy aircraft. This is one of only two sites in the world where you can see all three designs. A forerunner of radar, the ‘listening ears’ were built on the south and northeast coasts of England.
How to find us
![](http://www.followthebrownsigns.com/wp-content/themes/satoshi/images/comment-button-hover.png)