Facebook made history by launching one of the largest initial public offerings. As Facebook tests its fortunes at the bourses, take a tour through its sprawling campus...

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A Facebook employee works in the design studio at the company's headquarters in Menlo Park.

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Facebook CEO Mark Zuckerberg and his girlfriend Priscilla Chan walk near Fuxing Road in Shanghai.

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Facebook CEO Mark Zuckerberg gestures during his keynote address at the Facebook f8 Developers Conference in San Francisco.

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An investor holds prospectus explaining the Facebook stock after attending a show for Facebook's initial public offering at the Four Season's Hotel in Boston.

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Investors holding literature explaining the Facebook stock share a laugh as they leave the Four Season's Hotel after attending a show for Facebook''s initial public offering in Boston.

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An employee writes a note on the message board at the new headquarters of Facebook in Menlo Park.  

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Facebook Inc. COO Sheryl Sandberg arrives at New York City's Sheraton Hotel with other Facebook executives.

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People walk near a sign welcoming the IPO of Facebook outside the offices of J.P. Morgan in New York City, New York.

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A giant "like" icon made popular by Facebook is seen at the company's new headquarters in Menlo Park.

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An employee works on a computer at the new headquarters of Facebook in Menlo Park.

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Employees wait at the IT service desk at the new headquarters of Facebook in Menlo Park.

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Mark Zuckerberg arrives at New York City's Sheraton Hotel as security guards try to shield him and other Facebook executives from cameras.

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A sketch of Mark Zuckerberg is seen on a wall at the new headquarters of Facebook in Menlo Park.

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A Facebook employee works in the design studio at the company's headquarters in Menlo Park.

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An employee rides a bicycle at the new headquarters of Facebook in Menlo Park.

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Facebook employees work in the design studio at the company's headquarters in Menlo Park.

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Mark Zuckerberg delivers his keynote address at the Facebook f8 Developers Conference in San Francisco.

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A convoy of SUVs is allowed past barricades before a Facebook Roadshow at the Crowne Plaza Hotel in the Palo Alto.

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Mark Zuckerberg delivers a keynote address at the company's annual conference in San Francisco.

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An employee walks near a telephone booth for private cell phone discussions at the new headquarters of Facebook in Menlo Park.

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Mark Zuckerberg arrives for a wedding ceremony in central Bangkok.

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Mark Zuckerberg holds a gong while celebrating with members of his staff after unveiling the company's new location services feature called 'Places' during a news conference at Facebook headquarters in Palo Alto.

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Facebook employees work in the design studio at the company's headquarters in Menlo Park.

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A superman costume hangs at a telephone booth for private cell phone discussions at the new headquarters of Facebook in Menlo Park.

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Mark Zuckerberg delivers his keynote address at the Facebook f8 Developers Conference in San Francisco.

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An art and message board is seen in a hallway at the new headquarters of Facebook in Menlo Park.

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President Obama takes off his jacket as he attends a town hall meeting at Facebook headquarters with CEO Mark Zuckerberg in Palo Alto.

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Employees work in the international user operations area at the new headquarters of Facebook in Menlo Park. 

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Mark Zuckerberg delivers his keynote address at the Facebook f8 Developers Conference in San Francisco.