Relict of one of the radomes at the NSA listening station on Teufelsberg hill. Mobile Allied listening units began operations on Teufelsberg in 1961. The station was abandoned in 1992.
<a href="//commons.wikimedia.org/wiki/User:KK_nationsonline" title="User:KK nationsonline">KK nationsonline</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>