A very simplistic form of "<i>knit graffiti</i>" (also known as "<i>urban knitting</i>" or "<i>knitta</i>") on an overpass in Copenhagen, Denmark.
<a href="//commons.wikimedia.org/wiki/User:Heb" title="User:Heb">heb</a>@<a href="//commons.wikimedia.org/wiki/Main_Page" title="Main Page">Wikimedia Commons</a> (<a href="//commons.wikimedia.org/wiki/Special:EmailUser/Heb" title="Special:EmailUser/Heb">mail</a>)
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>