The 57-acre campus, which formerly housed Sun Microsystems, features open work spaces for nearly 2,000 employees.

Another picture of the exterior.

A giant "like" sign is outside.

This is their cafeteria.

They have a giant "art board" in one of the hallways.

Another hallway.

This is the IT area.

Another picture of the IT area.

An employee working on a couch.

A sketch of Mark Zuckerberg on a random wall.

Employees can choose to either sit or stand.

Employees chatting.

The international user operations area.

An employee working in the international user operations area.

A giant "wall."

A superman costume hanging on a telephone booth for private cell phone discussions.