2. 20 Exchange Had the Largest Private Phone Exchange in the World

20-exchange-place-skyscraper-downtown-manhattan-observation-deck-film-locations-inside-man-nyc_12View from rooftop of 20 Exchange Place, 70 Pine on the left

When the building opened, the 15th floor was given over to 40 telephone operators whose job was to handle over 100,000 calls daily from around the world- necessary at the time for a banking operation that had offices in 11 countries.