An exhibit at the Newseum includes a portion of the wall which separated East and West Berlin. This is the guard tower preventing anyone from crossing over. I once had the privilege to go into Communist East Berlin with a few classmates and my German teacher to visit some of her relatives. It was eerie, as we knew we were being watched.
@thewatersphotos The Newseum is 6 stories. The guard tower is located at the basement level (I think). So, this was open at the top. Much better photo than the one I took at the bottom looking up.