For the record, the intersection at bottom center is 116 and Broadway, looking north; the station house is for the 116th street stop on what is now the 1/9. The bottom of the valley is 125th St. You can see up until somewhere in the 160s or 170s in Washington Heights from this vantage point.
At left is Barnard College; at right is Columbia University. Both Universities stretch back to 120th Street, which is the first nearest cross street beyond 116. Behind Barnard one of the spires of Riverside Church is visible, and one of the Teachers' College buildings is visible just beyond the northern border of Columbia University.
Let's see... the most profound differences between "then" and "now:"
The station house on the median is gone - in its place are the usual sidewalk entrances, one on each side of Broadway at 116th.
116th St. is now closed to vehicular traffic east of Broadway, where it goes through Columbia University - it's now a brick-paved pedestrian path known as College Walk.
There are more buildings present. Present-day map of area You can see several buildings which were added after the picture was taken, particularly on the left (Barnard) side. The vantage point of the picture is right where it says "IRT" in the diamond, looking up (north)
There are some great pics of the neighborhood today here, including shots of the 125th St. station on the 1/9 - the big arch across Broadway at 125, a shot of the Riverside Viaduct which carries Riverside Drive above 12th Ave over the 125th St. valley. There's also a picture of the 117th St. gate, which is the gap between the two nearest buildings visible on the right side of the old picture.
Here's a (tiny) view of the same area, looking north along Broadway somewhere about 116th:
Sorry, but that was the best I could find for now...
