This NWA tribute was maybe a bad idea for Microsoft. Matt Weinberger/Business Insider Microsoft's main campus in Redmond, Washington, is big. Like, 8 million square feet big.

The good news is that you don't have to worry about seeing it all if you make the visit. The bad news is that it's because almost every one of its 80 buildings is closed off to nonemployees.

But there's one building open to everybody: the Microsoft Visitor Center. It's home to the Microsoft Company Store, a gift shop that carries exclusive merchandise that you can only get on the campus.

Some of it's weird, some of it's silly, some of it's actually pretty cool, but you can only get it if you make it to Microsoft's campus (though a very limited selection is available online). Check it out: