-my two favorite stations, which I remember as a child and college student, are alas, no longer there. But check out the old photos etc.
-the first was the large elevated station at the Manhattan side of the Brooklyn Bridge. It was an awesome way to get to New York from Brooklyn. (the BMT on the Manhattan Bridge is good, but Brooklyn Bridge was even better.)
-the second was the Third Ave El terminal at Botanical Garden, Bronx. Some of the trains ran north one stop from the large Fordham Road El station in a separate spur, alongside the rural greenery of the Fordham University campus, and ending at the Botanical Garden. This was a small end-of the line station in a country setting, a few el cars parked there. The building, modelled on its neighboring Botanical Garden greenhouse, had a large glass dome and was brightly illuminated inside the station building. A many arched stone bridge led past the Fordham campus to Southern Boulevard, where you could walk to the entrance of the Garden.
It was the prettiest, most peaceful subway station I ever saw. Too bad it was torn down in 1951.
Roger