I've been busy in astronomy-land recently, trying to make some headway on my thesis before beginning a summer internship (more on both hopefully in the coming months!) For this site, recently I've been playing with some interesting data, trying to find the "story" - which is really a way of saying I haven't found the truly clever question yet. Lots of pretty/interesting visualizations have been made, however.
In the meantime, I thought the following map was pretty incredible. I present:
The World, Traced by Airport Runways.
This was generated using 45,132 runways (awesome data from here). Think about that number for a moment: there are at least 45,000 places to land an airplane! These range from small dirt fields to LAX, and the data seems to be more complete in the USA. Still, runways on every continent, seemingly every country.
Update: You can now purchase a poster version of this map. Neat!