Perched atop one of Berlin’s highest elevations, Teufelsberg (German for “Devil’s Mountain”) rises above the Grunewald forest, its crest crowned with the eerie and decaying remnants of a once-secret Cold War listening station. The Teufelsberg Listening Station is not only a relic of 20th-century geopolitics but also a symbol of history’s layered complexities, urban transformation, and the enduring mystery of…