These drawings on a flat sidewalk are absolutely amazing: http://myhealingkitchen.com/soul-food/the-chalk-guy-is-back-amazing/ to see many of them. I would love to see one in person.
But first of all, who is Julian Beever?
According to Wikipedia: “Julian Beever is an English, Belgium-based chalk artist who has been
creating trompe-l’œil chalk drawings on pavement surfaces since the mid-1990s.
His works are created using a projection called anamorphosis, and create
the illusion of three dimensions when viewed from the correct angle.”