Thank you to the awesome reader who suggested this website! HistoGrafica has some really great images from around the world. If you have old photos to share, this is a great place to share them. You can check out photos based on Google Maps. This is one that I found from 1898. My office is about a block from the Castle. But I have meetings in there every now and then. Here's some more history on the Smithsonian Castle.