Today's mystery photo is shrouded in mystery as there was a time when Roosevelt Island was governed not by RIOC by the RIGC, the Roosevelt Island Garden Club and this was their emblem which once was emblazoned on every structure and obelisk until Moses was cast out of Egypt. Sorry wrong story.
The question today is not so much which structure this is although positive identification would be nice but rather is this emblem still there and if not where is it?
The above photo was taken by Dan Dickinson and was found on Flickr via this link.
Update: May 31st:
The below photo is also on Flickr and was taken by me last weekend: