tub/shower combo with no doors/curtains I just LOVE the idea of NO tracks or doors or anything to get all gunky! I hate the shower/tub situation usually, but I could possibly deal with it if it was a sunken bath.
Circles Within Circles Optical Illusion The image here appears as if it's pulsing to us. Look really hard and you can see the black and white colors in the image that work to make it look as if it's moving.
Dice optical illusion The dice appear to form an impossible triangle. If the position of the camera was to shift slightly, you would see that in reality the 'triangle' is actually created by three lines of dice arranged in the shape of the letter 'Z'