In the heart of Berlin’s Tempelhof-Schöneberg district sits a hulking, crumbling concrete cylinder—an abandoned relic of a Nazi plan to rebuild the city as a grand imperial capital. But this eerie structure isn’t just a forgotten engineering experiment; it’s a lasting monument to one of the Third Reich’s most colossal architectural failures.The Nazi Block Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to ad-free new episodes and get exclusive access to bonus content.