The classic photo "Lunch atop a Skyscraper" shows 11 steel workers calmly eating lunch, while sitting on a long girder, framed by the city far below them. The story of this photograph and the construction of New York's iconic skyscrapers is the basis for Men at Lunch, one of the films selected for this year’s Toronto International Film Festival.

The movie, Men at Lunch, delves into the story of the photo, the loss of the original glass plate negative and its eventual re-discovery.

The photo was taken by Charles C. Ebbets on September 29, 1932, during the construction of GE building at Rockefeller Center. Mr. Ebbets dragged a large glass-plate camera and a case filled with fragile glass photographic plates all the way up the building to take the picture.

Watch the trailer for the documentary below.

Also, check out this slideshow of similar skyscraper photos.