Using a GPS-enabled briefcase as a pen, Erik Nordenankar created a self portrait across the face of the entire globe. With the help of DHL, Erik created the 110664 km portrait in 55 days and with a continuous stroke.
Check out the video to see how it was done:
Update: As we learned from comments section, Nordenankar did not quite create the project as indicated. Read more about the story on Wired.