UK | GCHQ Bude

https://www.openstreetbrowser.org/#map=16/50.8856/-4.5533&categories=military,communication
https://earth.google.com/web/search/50.8862,-4.5537

Wikipedia EN: https://en.wikipedia.org/wiki/GCHQ_Bude

Other Source: NSA pays £100m in secret funding for GCHQ, The Guardian, 1 Aug 2013-
https://www.theguardian.com/uk-news/2013/aug/01/nsa-paid-gchq-spying-edward-snowden