These are some chalk drawings from Julian Beever.
Julian Beever is an English artist who's famous for his art on the pavement of England, France, Germany, Australia and Belgium. His images are drawn completely deformed, which give a 3D image when viewing on the right angle. See for yourself, it's amazing !!!
The image below has been taken at a wrong angle
This is the same one viewed on the right angle...
[size=14][b]Letters from the procupine, they'll stick straight through you.
So read one anytime you think you've made mistakes.[/b][/size]
There is another artist who specializes in this kind of work named Kurt Wenner... His art is more classical, though, whereas Beever's art is more commercial... Personally, I prefer Wenner's work... Here is an example: