I remember the first time I came to DC. I was almost 4 years old.
My folks took me to the Smithsonian, the White House, the US Capitol, and the Washington, Lincoln, and Jefferson Monuments. And, I remember a most curious little house on the edge of the mall, near the Washington Monument. I thought it was for the Park Police. (It was then- but, then they abandoned it. It simply became the home for vagrants, until it was “locked up”.)