this kind of street art is amazing. but this one is very extensive which makes it awesome. a whole street is converted to a cavern. this plays a beautiful trick on the eyes by using depth and perspective. looking at these can kind of give you an idea of how to making a flat surface look like it has depth. because this street art is so big and long it takes your eye all the way back and keeps going.
Waterfall Illusion Another great optical illusion of a waterfall drawn on concrete. German artist Edgar Mueller creates large scale, three-dimensional art using an unusual canvas – his works are painted on ordinary sections of sidewalks.