The Black Cubes
This is truly bizarre ... and incredible. An artist is creating 999 black wooden boxes that you can buy. Each one has something in it, but you don't know what that something is. If you open the box, you'll find out what it is, but you'll also destroy what the artist intended. So if you want a mystery black box that you can never open, that's also a piece of art, look no further. I think it's a pretty cool idea.