If you ever had the opportunity to stay at the luxurious Morgans Hotel in New York, I'd recommend you try this experiment. In the the bathroom of this hotel, the glass shower doors are behind a checkered wall. When water droplets are splashed upon the surface, the wall begins to form a unique checkered pattern.

It’s a very clever and interesting illusion within the Morgans Hotel, and it'd definitely be a something to look forward to if you're ever planning on staying there.