Looking for more images of America, I found Shorpy. Hundreds of pages of old pictures from the Library of Congress, mixed in with old pictures of family and slides bought on e-Bay. Each one with some explanation, but always a window into a bygone place.
Here’s an image from page 260.
“1917. U.S. Navy Yard, Washington. Sight shop, big gun section.”
What you have caught on film is captured forever. It remembers little things, long after you have forgotten everything.