Let there be holiday lights! Windows at Grand Central Terminal feature a festive light show. Check it out! #gct #gct100 #grandcentral #nyc #holidaylights #christmas #christmasinnyc

Let there be holiday lights! Windows at Grand Central Terminal feature a festive light show. Check it out! #gct #gct100 #grandcentral #nyc #holidaylights #christmas #christmasinnyc

There were once 11 payphones lined up on this Grand Central wall. Only 2 remain. #payphones #relics #gct100 #payphoneography #retro

There were once 11 payphones lined up on this Grand Central wall. Only 2 remain. #payphones #relics #gct100 #payphoneography #retro

The #Monopoly Grand Central Terminal edition? Yes! #gct100 #nyc #boardgames

The #Monopoly Grand Central Terminal edition? Yes! #gct100 #nyc #boardgames

Nice view of #gct100 from The Apple Store.

Nice view of #gct100 from The Apple Store.

Best. MetroCard. Ever. #gct100

Best. MetroCard. Ever. #gct100

A clock from the Self Winding Clock Company at Roy’s in Carrizozo, #newmexico Thousands of these clocks once ticked across the U.S., powered by Western Union. This is the same company behind the famed clocks at Grand Central Terminal. #gct #gct100 #clocks #antiques

A clock from the Self Winding Clock Company at Roy’s in Carrizozo, #newmexico Thousands of these clocks once ticked across the U.S., powered by Western Union. This is the same company behind the famed clocks at Grand Central Terminal. #gct #gct100 #clocks #antiques

The PIX11 morning crew was at Grand Central Terminal to tape a segment on the building’s secrets. Watch it tomorrow morning on the PIX11 Morning News. #pix11news #pixnyc #gct100

The PIX11 morning crew was at Grand Central Terminal to tape a segment on the building’s secrets. Watch it tomorrow morning on the PIX11 Morning News. #pix11news #pixnyc #gct100

Something very cool is under wraps right now at Grand Central Terminal, which is going to celebrate its 100th birthday on Friday. PIX11 will have interesting reports on #gct100 on Friday, including a look at the “secrets” of Grand Central. Don’t miss it.

Something very cool is under wraps right now at Grand Central Terminal, which is going to celebrate its 100th birthday on Friday. PIX11 will have interesting reports on #gct100 on Friday, including a look at the “secrets” of Grand Central. Don’t miss it.

This is cool. Grand Central is turning 100 on Friday. You can buy all sorts of neat collectibles at the Transit Museum annex there, like this little Grand Central clock. This one is a steal at $45, considering the real one is worth millions of dollars. #mta #gct #gct100 #pixnyc #pix11news

This is cool. Grand Central is turning 100 on Friday. You can buy all sorts of neat collectibles at the Transit Museum annex there, like this little Grand Central clock. This one is a steal at $45, considering the real one is worth millions of dollars. #mta #gct #gct100 #pixnyc #pix11news