Grand Central Terminal opened at midnight on Feb. 1, 1913, instantly becoming New York City's largest transportation hub and one its most iconic buildings. The building in Midtown Manhattan cost $80 million to construct and sits on nearly 70 acres, two and a half times the size of nearby Pennsylvania station. It connects commuters with the Metro-North Railroad and the subway, and a mega-project is underway now to add Long Island Rail Railroad to that list.

Officials are celebrating the terminal's 100th birthday today with cake, a new museum exhibit, performances and celebrity appearances.

Click through to see iconic historical photos of the station, as it celebrates its 100th anniversary.

Photograph by Hal Morey/Corbis

Grand Central Terminal opened at midnight on Feb. 1, 1913, instantly becoming New York City's largest transportation hub and one its most iconic buildings. The building in Midtown Manhattan cost $80 million to construct and sits on nearly 70 acres, two and a half times the size of nearby Pennsylvania station. It connects commuters with the Metro-North Railroad and the subway, and a mega-project is underway now to add Long Island Rail Railroad to that list.

Officials are celebrating the terminal's 100th birthday today with cake, a new museum exhibit, performances and celebrity appearances.

Click through to see iconic historical photos of the station, as it celebrates its 100th anniversary.

Photograph by Hal Morey/Corbis

Grand Central Station Turns 100

Grand Central Terminal opened at midnight on Feb. 1, 1913, instantly becoming New York City's largest transportation hub and one its most iconic buildings. The building in Midtown Manhattan cost $80 million to construct and sits on nearly 70 acres, two and a half times the size of nearby Pennsylvania station. It connects commuters with the Metro-North Railroad and the subway, and a mega-project is underway now to add Long Island Rail Railroad to that list.

Officials are celebrating the terminal's 100th birthday today with cake, a new museum exhibit, performances and celebrity appearances.

Click through to see iconic historical photos of the station, as it celebrates its 100th anniversary.

Photograph by Hal Morey/Corbis

Travelers are bathed in light streaming from the large windows in the station.

Photograph by Corbis

Roadbed excavations along Park Avenue during the preliminary construction of Grand Central Station in Manhattan.

Photograph by Bettmann/Corbis

The original plans for Grand Central Terminal in New York in 1903, called for a building above the station which would serve as a hotel or office building. Basic steel work was included in the construction of the terminal although the project was never carried out.

Photograph by AP Photo

Pedestrians walk beneath the awnings and elevated driveway surrounding the terminal on October 28, 1927.

Photograph by Corbis

A man and woman talk together as people pass through the Main Concourse in October 1941.

Photograph by John Vachon/AP Photo

Would-be passengers sit on their luggage in Grand Central Terminal, where they were stranded by the rail strike on May 23, 1946.

Photoraph by Bettmann/Corbis

Travelers pass through the station in 1961.

Photograph by Roger Wood/Corbis

Some 5,000 workers watch the launching of astronuat John H, Glenn Jr. into orbit around the world Feb 20th, 1962, on a huge television screen in Grand Central Station. Glenn reported that all systems were working satisfactorily and the flight was going smoothly after more than an hour in orbit.

Photograph by Bettmann Corbis