The famous opalescent clock keeps time at the center of the main concourse in Grand Central Terminal in New York. | AP Photo

Travelers cross the main concourse of Grand Central Terminal in New York. | AP Photo

The mythological figures Hercules, Mercury, and Minerva adorn the main facade of Grand Central Terminal, part of a sculptural group created by Jules Alexis, atop the terminal. | AP Photo

The Grand Central Terminal in New York, the country's most famous train station, turns 100 on Feb. 1, 2013. | AP Photo

David Herring (right) assists travelers with their train's track number from his post inside the information booth at the center of the main concourse at Grand Central Terminal. | AP Photo

Passengers disembark from a Metro-North Railroad car after it pulled into Grand Central Terminal. The landmark train station, one of the country's most famous examples of Beaux Arts architecture, turns 100 on Feb. 1, 2013. | AP Photo

Passengers disembarking from a train pass a sign advertising the 100th anniversary of Grand Central Terminal in New York. | AP Photo

It's a well-kept secret that the departure times on the board in Grand Central Terminal's main concourse are posted one minute earlier than the trains actually leave to ensure passengers board in time for the train's departure. | AP Photo

Built by the Vanderbilts, railroad barons and industrialists who were among America's richest and most powerful families, track entrances are adorned by acorns and oak leaf clusters, the family's symbols, at Grand Central Terminal. | AP Photo

Grand Central Terminal in New York is one of the country's finest examples of Beaux Arts architecture. | AP Photo

When the Oyster Bar opened its doors in 1913 at Grand Central Terminal, Woodrow Wilson was president, the nation was on the verge of World War I and prohibition was six years away. | AP Photo

A 63-foot Redstone missile is hoisted into position for display in New York's Grand Central Terminal in this July 1957 photo. There is still a hole in the ceiling that marks the spot where cables secured the rocket ship for dislplay. | AP Photo, File

Workers keep an eye on train traffic coming and going from Grand Central Terminal from a master control room high atop the building in New York. | AP Photo