This website is very difficult for an English speaker to navigate, but if you do, you will find many interesting art projects that will blow your mind.

• Felice Varini

When viewed from the wrong angle, the art of Felice Varini just looks like random lines or, worse still, huge splotches of blue on the sides of buildings. When you are standing at the correct focal point, however, everything comes together and it appears that a series of circles are hovering over the room (or city landscape in one of his works).

I find his work amazing. Based on the pictures on his website, it looks like he uses a projector to guide where he puts the lines, but I have no idea how he did this on the city. The huge old buildings have large swatches of blue in strange angles, but when you view them from the right spot, there is a large bullseye on the building down the way.

See this website for an easier to navigate vignette of his work:

• Museum of Hoaxes – Painted Room Illusions