Visiting company headquarters
part of a corporate structure that deals with strategic planning, corporate communications, taxes, law, marketing, finance, human resources, and information technology etc
Some company headquarters are open to public visits and even offer tours.
Some people go to company offices just to get a photo taken next to the company logo. It may seem silly, but people will go to Facebook's headquarters, take a picture of themselves there, and then post the picture on (guess where?) their Facebook page.
Some companies have their visitor facilities at an alternative location, for example a company museum, shop or exhibition center. Companies that operate in several locations may have the official headquarters in a small office that is separate from any of the regular company facilities - there may only be a small nameplate to see there.