I'm a fan of train station architecture. Maryland has a lot of small Victorian depots from the 19th Century, mostly built by the B&O Railroad. The two best are generally considered to be at Point of Rocks and Gaithersburg, both of which still operate as MARC stations.
Here is Point of Rocks:
And Gaithersburg:
There are several more, though not as good. Here is one picture of Rockville (on the right). Although Rockville still has a very active station served by MARC, Amtrak and Metro, the platforms are at all new facilities, leaving the old depot to office use.