In Microsoft's "high-five" hallway, which is a real thing despite all logic suggesting it wouldn't be a real thing. Filmateria Digital LLC Microsoft's campus is kind of ridiculous.

It's gigantic, sprawling, and when you arrive, you feel like you're entering a futuristic college. It's got a hallway dedicated to high fives. Really.

Unlike Apple, which is mostly a phone company, Microsoft has 12 different divisions that generate a billion dollars in revenue. When the Windows business is in bad shape, the Servers and Tools group, or the Office group, picks up the slack.

Similarly, Microsoft's campus isn't just one giant donut-shaped glass spaceship, like Apple is building as its new headquarters. Instead, it's over 120 buildings spread across Redmond, Washington — a suburb of Seattle, just a short ride by car.

It's more like a town than a headquarters: To get around, you take Microsoft shuttles; even people who spend lots of time at the campus get lost easily.

We visited Microsoft in the summer of 2013, and we had a photographer with us snapping photos. Here's what it's like to wander Microsoft's massive campus.

Jay Yarow contributed to an earlier version of this story.