Trompe-l'œil video projection on building facade. Magic-eye.gif (GIF Image, 652x379 pixels) The Right Brain vs Left Brain test. Big Spanish Castle. Stare at the dot for 30 seconds.
Then, without moving your eyes, move the mouse over the image. The image will look like it's in color until you move your eyes. Note: JavaScript must be on for this illusion to work! Check your browser settings.