New York's Grand Central Station is celebrating it's 100th anniversay today - February 1, 2013.  Did you know, though, that it has some secrets? Per another article by CNET "Grand Central's multimillion-dollar secrets", here are some of the secrets this train station holds:

---the central information booth has a hidden spiral stairway & the clock on top contains very valuable opal and worth around $20 million.

---there is a hidden train station underneath the present train station that was built for President Franklin Delano Roosevelt.

---could have the world's most efficient system for returning lost and found items.

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Also some facts by Wikipedia and a 3rd CNET article:

---it's the largest train station in the world by number of platforms

---it has two levels that are underground

---it's official name is "Grand Central Terminal"

---the 6th most visited tourist attraction in the world

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If you would like to see  the pictures larger with more detailed information, see here.

Huffington Post also has an article celebration this train station's 100th anniversary.