Yasushi Takahashi is a Japanese artist known as Yassan. In 2010, he quit his job, telling people that he would spend a few months traveling across the country. What he was actually doing was proposing marriage to his girlfriend in an enormous drawing that traced his route through GPS navigation. According to Guinness World Records, Yassan's GPS drawing is the largest in the world.
The entire journey covered 4,451 miles, mostly on foot. Yassan also occasionally used cars, bicycles, and ferries. He wrote "Marry Me" and a drew a heart with an arrow through it.
The project ended successfully: when he showed it to his girlfriend, she said yes!
-via Rocket News 24