The Googleplex is the Google company headquarters, located in Mountain View, Santa Clara County, California, near San Francisco. The word Googleplex is a play on the words "googolplex" and "google.", from googolplex, the name given to 
, or one followed by a googol zeroes. There are certain values that Google claims are upheld at the "googleplex", e.g. large rubber balls, shade lamps.
Googleplex is also the abbreviated name of a very powerful computer in The Hitchhiker's Guide to the Galaxy by Douglas Adams:
'And are you not,' said Fook leaning anxiously forward, 'a greater analyst than the Googleplex Star Thinker in the Seventh Galaxy of Light and Ingenuity which can calculate the trajectory of every single dust particle throughout a five-week Dangrabad Beta sand blizzard?'
