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+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. <...