These 20 offices are some of the world's best-designed and most awe-inspiring. Ping-pong tables and bright plastic furnishings are so 2011. This year, the companies with impressive digs have taken a more nuanced approach to giving their employees a covetable workplace. Lavish libraries? Check. Classic mid-century modern chairs? Check. Exposed beams, bricks, and concrete? Definitely. Another observation: Several offices that made our list of editor's picks this year house relatively young (and very fast-growing) tech start-up companies. They're so cool they've pushed Facebook right off the list. Now, without further ado...
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