Serendipity in physical network

The genesis of the idea comes from Stephan about implementing a kind of “I’m feeling lucky” button on navigation devices. What will happen if the device will guide you not according to a target point but in a serendipity way, without any goal, any target, except the fact to spend time traveling, like surfing on web pages. It is not determining a random target because there is no target. Such behavior is so common on the web: we like spending hours surfing from pages to pages, reading things we didn’t look for at the beginning. Why not reproducing this (bad?) habit in the physical world? Why not implementing such serendipity features in Navigation GPS device: wandering from roads to roads to discover accidentally places.