Apple Park, California

Apple’s headquarters in Cupertino, the $5billion, Norman Foster-designed circular infinite loop, replaced the company’s 1990s campus a mile away (which had the better address: # 1 Infinite Loop Road.) This campus, on the site of a former Hewlett Packard campus, is called Apple Park. The circular main building, with a diameter larger than the Pentagon’s, is designed to house more than 12,000 Apple employees. The company has employed more than 100,000 people globally, and is among the largest information technology companies in the world, especially when measured by revenue.