And yes, of course, Joe remembers Bletchley, with its mysterious Nissen huts in various stages of decay, surrounded by suspect little hills which were clearly anything but, and the sprawling red-brick house which had been home to the greatest mathematicians an embattled Britain could lay hands on.

– Angelmaker, Nick Harkaway

The U.K.'s codebreakers cracked codes here during World War II. It's currently a museum.

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