I have already said that before: I have a crush on maps. They are like stories that can be read in many directions, a good reason to give them a good place.
To begin this series, the 2013 yearly report produced by http://www.mapbox.com (https://www.mapbox.com/osm-data-report/) on the activity of openstreemap in 2013. This wonderful data source (used often in this blog) allows interesting journeys; it is not necessarily more detailed than google maps or similar systems, but it allows the download of data that can be reused (as in shp format), be it from geofabrik or other sites as cloudmade. Such open source software as gvsig or qgis allow the reuse of the daa (some cartography notions definitely help).