A couple months ago, I posted a photo of rooftop chimneys from the Upper East Side. Then this past weekend, I found more chimneys on apartment buildings in Greenwich Village so I guess I'm starting a new series -- the chimneys of New York City.These chimneys in the photo was located on the rooftop gardens (with wooden fences) above the 5th floor of the apartment building. But then again, are those onion dome shaped metal structures with circulating parts really chimneys or air circulation apparatus? Does anyone know?