From atop the highest point of the man-made elevation known as Teufelsberg in Berlin, lies one of the most peculiar series of structures. On a location drenched in Berlin's juxtaposed history, these dystopian sci-fi buildings once served as a NSA listening tower during the cold war. Since abandoned and now a growingly popular tourist attraction, the towers at Teufelsberg are also home to some of the most unique and bizarre sounding acoustics you'll ever hear. 

These recordings are free to use in your projects, though I would appreciate proper crediting if you do! Also these are not to be repackaged, resampled or resold in any commercial sound library. Really though, who does that?