The Pavement Picasso
British pavement artist Julian Beever, nicknamed "the Pavement Picasso," created a modern-day Fountain of Youth in the core of the Big Apple. on the south side of New York's Union Square.
He painted on the two-D surface of the sidewalk an incredibly realistic 3D image of a fountain splashing water into a blue pool. An attractive girl was apparently standing in the shrub-lined pool, and at the far end a man was testing the depth of the water with one foot. But it was all a magnificent illusion.