The Untold Secrets of Grand Central Terminal.

An average of 750,000 people pass through New York’s iconic Grand Central Terminal each day—but most of the 49-acre, 1913 Beaux Arts building has always remained off-limits to the general public. With the help of Cornelius Vanderbilt II’s great-great-grand-niece Consuelo Vanderbilt Costin, Grand Central Terminal director George Monasterio, and Grand Central’s senior architect Mark Saulnier, Bloomberg got an inside look at the spaces (and secrets) you never knew to ask about. Inside the Tiffany clock, considered the jewel of the Grand Central façade.