The Museum of the City of New York has a great image of children lacing up their skates to skate on the Harlem River at McComb’s Dam (155th Street).
The image is from 1904.
Further South, The Triborough
A great, 1937 photograph of the Triborough Bridge by Berenice Abbott as a part of the Federal Art Project in the depression. The bridge was just a year old.
Below shows the wire strands necessary to support the bridge:
From the vantage below, you can see how the Triborough (from Queens) was built in stages on cleared land:
Lastly, below, opening day with a presidential motorcade.