So the next day I brought a little camera I borrowed from my girlfriend. I must admit I didn't really know how to use it all that well, so forgive me if some of the following pictures aren't quite what they should be. I'll figure out how to use auto-focus some day soon... I promise.
The first picture shows the drawing I saw that first day, and it's still my favourite. It has this nice "distressed" quality, like it's been there for ages. And it looks like it's not quite finished. Maybe whoever made it got interupted?
Walking around the neighbourhood I found a whole lot more of these drawings, some clearly by the same artist, others most likely by someone else.
If anyone recognizes his or her own work, or knows who made these, feel free to leave a message in the comments.
Meanwhile I'll be keeping my eyes open for more of these. Maybe it could be the start of a whole collection? Or I could just post them here for you all to enjoy...