Navigation is a central aspect of interaction design on the web. If the navigation of a site is bad, the user won’t find his content and experiences a bad product. Luckily there are several proven tools that help the user to find his way on the web: the top menu, the sub menu, and the breadcrumb.
But there is one aspect that interaction design has not tackled yet: how navigation works outside of the web in the real world. Or better yet, how the brain works with regard to navigation. The brain switches to “navigation mode” when it has to travel through an environment that is larger than the direct perception. That makes sense, because if you have can see the destination of your travel, you can just navigate on sight. For example, if you want to travel from one side of a open field to another side of the field, you can see your destination and are able to continually adjust your movement towards it.