Stephen Lund cycles about 70km every day, creating clever doodles using a GPS app that maps his progress. The BC, Canada native began his unusual craft in 2015 to unwind and be creative; since then, he's logged 22,300km, and his longest piece has been a 220km mermaid.
"The best ones pop off the map," Lund says, explaining his process. "I liken it to seeing shapes in the clouds. I pour [sic] over a map of the city...The challenge is that the roads all have to connect — it has to be one continuous line."
Update: the actual world's record for the largest GPS drawing belongs to Yasushi Takahashi from Japan, for GPS drawing that was made in 2010. He made even larger piece in 2015 that was 105,734km long (not certified by Guinness World Records).