Here is a pretty funny story — Nick Newcomen apparently had some free time on his hands, so he drove 12,238 across 30 states with a GPS logger to “write” a message for all to see:
You can read the full story over on Gizmodo, but it appears that Nick was a pretty big Ayn Rand fan.
To see it for yourself, you can view it on his site
or download the KML file
to view it in Google Earth.