Transparent coffee cup Photo by: jkvandersteen What am I looking at? This transparent coffee cup is a perfect physical illusion. The reflection of the saucer in the smooth surface of the cup completes the floral pattern nicely. More optical illusions:Toe socks?Peacock with its head in the groundBird in the SkyMagnus the ImpaledHigh-rise buidingsA couple of cars in a parking lotBroken ChairBride kissing a fish