2012-08-21 48 9
In Stuttgart Vaihingen(?) right next to a sports field.
It was close to the route that I take to get from work to home and it seemed easy to reach, so I gave it a try on the way home.
Was pretty easy, I found the spot quickly, it was accessible and I took the photo of the XKCD letters that I painted into the loose gravel.
I think the land achievement was the only one.