I love walking aimlessly around a new neighborhood right after moving, taking in the sights and discovering the ins and outs of the place. I particularly relish those moments when I can distinctly feel two disjoint areas of my mental map connecting. Initially, a new area is just a collection of landmarks - there's the palace, and I think the station is somewhere nearby, and there's a Starbucks around here somewhere, and that big road is maybe 15-20 minutes away from that other big road. But without actually experiencing how the sections connect to each other, the map in your head is necessarily incomplete. Maybe you can start in the center and work your way out radially to each of the landmarks, but what about getting from point A to point C? And then one day, as you're leaving point A and you turn the corner, you spot point C 500m up ahead, and the map will thereafter make perfect sense to you. Just as this feeling came over me again the other day (that's where the s...