![DCIM103MEDIA An aerial view of Facebook's new campus, an expansion of its current headquarters in Menlo Park, Calif. The LEED-certified building, known as MPK 20, has a 9-acre "green roof."](https://api.time.com/wp-content/uploads/2015/05/17-facebook-headquarters-then-now.jpg?quality=85&w=2400)
Correction appended
Facebook started in a college dorm room, and CEO Mark Zuckerberg seems to be trying to recapture the kind of spontaneous collaboration that can happen in those spaces with the social networking giant’s new building.
Dubbed by the company as the “largest open floor plan in the world,” the new 430,000-square-foot, single story facility in Menlo Park, Calif. places thousands of workers — Zuckerberg included — in a single giant room. Product teams are clustered together throughout the sprawling space, which resembles an aircraft hangar. Atop the building is a 9-acre park with walking trails and seats to host outdoor meetings.
The design of the new workspace, intended to encourage collaboration, is also supposed to reenforce Facebook’s overall mission of connecting the world. “We wanted our space to create the same sense of community and connection among our teams that we try to enable with our services across the world,” Zuckerberg said back in March when he and his employees moved in.
The building, called MPK 20 and designed by celebrated architect Frank Gehry, is a far cry from the more pedestrian office complex that used to be the base of their operations — although the company still uses that building as part of its campus. Here, we offer some comparison shots between the older and newer spaces.
Correction: The original version of this article incorrectly described the purpose of Facebook’s new facility. It is an extension of its headquarters.
![Facebook Headquarters An aerial of Facebook headquarters in Menlo Park CA on the San Francisco Bay.](https://api.time.com/wp-content/uploads/2015/05/01-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![DCIM103MEDIA An aerial view of Facebook's new campus, an expansion of its current headquarters in Menlo Park, Calif. The LEED-certified building, known as MPK 20, has a 9-acre "green roof."](https://api.time.com/wp-content/uploads/2015/05/17-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![Hack Hack](https://api.time.com/wp-content/uploads/2015/05/03-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![The roof of the new campus contains a half-mile walking loop for employees and over 400 trees.](https://api.time.com/wp-content/uploads/2015/05/19-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![Inside Facebook's New Menlo Park Campus Buidling 10 stands on the Facebook Inc. campus in Menlo Park, California, U.S., on Dec. 2, 2011.](https://api.time.com/wp-content/uploads/2015/05/07-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![The new Facebook headquarters, known as MPK 20, opened this spring](https://api.time.com/wp-content/uploads/2015/05/18-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![Happy Happy Worksites Facebook employees are shown on the campus in Menlo Park, Calif., Friday, March 15, 2013.](https://api.time.com/wp-content/uploads/2015/05/09-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![The lobby of the new campus is entered from the roof.](https://api.time.com/wp-content/uploads/2015/05/20-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![A general view of the outdoor lunch and A general view of the outdoor lunch and relaxtion area at the old Facebook main campus in Menlo Park, California on May 15, 2012.](https://api.time.com/wp-content/uploads/2015/05/08-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![A view of the MPK 20 roof at night, which is topped by a massive garden](https://api.time.com/wp-content/uploads/2015/05/12-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![Inside Facebook's New Menlo Park Campus A Facebook Inc. employee works on a laptop computer at the company's old campus in Menlo Park, California, U.S., on Dec. 2, 2011.](https://api.time.com/wp-content/uploads/2015/05/06-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![Facebook employees took to Instagram to show off parts of their new digs, such as this artwork in the MPK 20 building.](https://api.time.com/wp-content/uploads/2015/05/21-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![Happy Happy Worksites A Facebook employee walks past The Facebook Wall at the old Facebook headquarters in Menlo Park, Calif. on March 15, 2013.](https://api.time.com/wp-content/uploads/2015/05/10-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![Colorful artwork adorns many of the walls at Facebook's new campus.](https://api.time.com/wp-content/uploads/2015/05/15-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![Inside Facebook's New Menlo Park Campus The desk is staffed inside the lobby area of the old Facebook Inc. campus in Menlo Park, California, U.S., on Dec. 2, 2011.](https://api.time.com/wp-content/uploads/2015/05/04-facebook-headquarters-then-now.jpg?quality=75&w=2400)
![The Frank Ghery-designed staircases are designed to be bring in lots of natural light, as opposed to the claustrophobic stairwells of traditional office buildings](https://api.time.com/wp-content/uploads/2015/05/13-facebook-headquarters-then-now.jpg?quality=75&w=2400)
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