18/06/2026
Beneath a quiet Berlin street, the Cold War was listening. 🕵️♂️
In 1954, American and British intelligence began digging a secret tunnel under East Berlin. The goal was simple and dangerous: tap Soviet military phone lines without being seen.
For months, the tunnel recorded thousands of calls. Wires, mud, headphones, notebooks, silence. 🎧
But there was one problem.
The Soviets already knew. 👀
A double agent had betrayed the plan before the digging even began. And still, they let the tunnel operate, because exposing it too early would reveal their own source.
Berlin is full of stories like this: hidden under streets, behind walls, and inside places people walk past every day.
Walk Berlin’s hidden history with me.
Book your spot: berlinwalk.com 🚶♂️