Most maps are static representations of a geographical snapshot in time but the world changes constantly, especially in fast-moving situations such as wars or natural disasters - something I recently explored in a recent documentary for BBC Radio 4, Mapping the Void.
I must at this stage confess, I have an iPhone 4S. A bizarre statement to make while trying to recruit members of my anti-smart phone army, but bear with me. I have only had it since December and, no, it wasn't my choice.
Going on a walk allows us to take a step back from our daily routine. You can feel the wind in your face, the changing of the seasons, the excitement of coming across a beautiful building or the buzz from immersing yourself in a rich social history.