It fascinates me how adding a feature or two to an almost blank canvas can act as a 'seed'.
Here's what has happened to the OSM map of Falaise (a significant but not large town in Normandy) over the last year ...
Last April it looked like this:
(images from Mapsource, not the online render, the red circle is a Mapsource overlay not a map feature)
Then I cycled through with some friends in May, stayed the night and moved on.
So a couple of weeks later it was looking like this:
By February of this year it was looking like this: