Serendipitor is an alternative navigation app for the iPhone that helps you find something by looking for something else.
The app combines directions generated by a routing service (in this case, the Google Maps API) with instructions for action and movement inspired by Fluxus, Vito Acconci, and Yoko Ono, among others. Enter an origin and a destination, and the app maps a route between the two. You can increase or decrease the complexity of this route, depending how much time you have to play with. As you navigate your route, suggestions for possible actions to take at a given location appear within step-by-step directions designed to introduce small slippages and minor displacements within an otherwise optimized and efficient route. You can take photos along the way and, upon reaching your destination, send an email sharing with friends your route and the steps you took.