Forty years after they were originally acquired for intelligence purposes, declassified US photographs from the KH-7 GAMBIT photo reconnaissance satellite programme, together with contemporary declassified intelligence reports, are being used to shed light on Cold War sites in the former Soviet Union. The method should have a great future for understanding the changes to the landscape in Europe over the last 60 years. The material impact of the Cold War was no less fundamental than other wars hotter in nature.