The Secret Cold War Spy Tunnel That Foolishly Exposed Itself in a Storm
Berlin (dpa) – Seventy years after the sensational—but ultimately illusory—discovery of an American spy tunnel beneath East Berlin, a new documentary volume reveals previously unknown details and photographs. The freshly unearthed materials in "Operation Gold: The Berlin Spy Tunnel" originate from a photographic record created in East Germany (GDR) and recently handed over to the Berliner Unterwelten (Berlin Underworlds) association.
The spy tunnel was a clandestine intelligence operation at the dawn of the Cold War. The U.S. Central Intelligence Agency (CIA) and Britain's Secret Intelligence Service (SIS, also known as MI6) sought to tap into the highly classified telephone lines of the Soviet high command. Between 1954 and 1955, they constructed a 430-meter-long tunnel running from Rudow in the American sector to Altglienicke in the Soviet-controlled zone.
Americans and British Eavesdropped on Soviet Military Calls
From May 1955 to April 1956, U.S. and British agents intercepted over 400,000 Soviet military telephone conversations. Unbeknownst to them, however, a double agent had already betrayed the tunnel's existence, and the Soviet KGB had been aware of the operation from the outset. The KGB allowed the project to proceed, primarily to avoid compromising their informant.
On the night of April 21–22, 1956, a violent storm caused disruptions to multiple telephone lines. The tunnel was allegedly "discovered" during repair work by Soviet and East German telecommunications technicians. The GDR seized the opportunity for extensive propaganda coverage, organizing press events and public tours of the site.
New Documentary Volume on the Secret Tunnel Unveiled
The 224-page documentary book (€24), published by the Berliner Unterwelten association, features 181 images—many from East German archives. Aerial and ground-level photographs, along with shots from inside the tunnel, illustrate its route and the elaborate, covertly installed technology. Visible in the images are corrugated metal roofing, sandbags, steel wire, wooden planks, ventilation pipes, water lines, electrical and signal cables, and the tapped telephone wires.
The authors of the volume are Dietmar Arnold, an urban planner and co-founder of Berliner Unterwelten, and Helmut Müller-Enbergs, a political scientist specializing in the history of intelligence services.
The book will be presented on Tuesday, April 21, at 7:00 PM at Berlin's Spy Museum on Leipziger Platz (registration required). Additionally, a livestream presentation by Berliner Unterwelten will take place on Wednesday, April 22, at 7:00 PM.
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