Postcard showing the view from Sunshine Terrace. The land jutting out into the Hudson from the left is the northern tip of Croton Point.
Text on the back reads:
Ann Robinson’s Sunshine Terrace
Rest—Sunshine—Diet
120 Old Post North
Croton-on-Hudson, New York
Telephone Croton 1-3695
CROTON 
Featured in an old March of Time – https://www.youtube.com/watch?v=OGEy6UYRUi0 – around 7:25