This incredible photo was taken around the opening of Grand Central Terminal in 1913. We noticed a couple cool details after zooming in:

-'Subway Entrance Downtown' on the corner

The Park Avenue Viaduct has not been constructed, even though there are cars on the upper level

-Cars and horses lined up on 42nd in front of the entrance

-Elevated station just to the east of Grand Central

-The clock has yet to be added to the statue of Mercury, Hercules and Minerva

-Original Belgian block pavers in between the streetcar tracks on 42nd Street

-Many of Grand Centrals windows are cracked open