The installation in the following image is made of salt. Salt, people.
I can't even wrap my head around that one. I mean, when I was a kid, and we went out to eat, I loved to pour out a package of sugar and trace designs into it. However, this takes it about a bazillion levels beyond that.
Here's video of just how Motoi Yamamoto does it:
And here's some links to view even more of his absolutely amazing work:
Design You Can Trust
So cool. Unbelievable--but man, so cool.