Rockefeller Center Construction: New York. Click to view full-size.
This 1932 photo by fearless photographer Charles C. Ebbets shows workmen eating lunch on the 69th floor of the GE Building during the construction of Rockefeller Center. The photo was originally published in the New York Herald Tribune. Notice that the worker on the far right is holding what looks like a liquor flask. I guess it gets chilly up there.
In additions to his daring work as a photographer, Ebbets worked as a pilot, a race car driver, and a professional wrestler.