When I found Hirotoshi Ito's flickr stream about four years ago, my eyes widened and my jaw dropped. I've come across some amazing sculptures before, but Hirotoshi's work is one of the most memorable I've seen.
The Japanese artist, also known as Jiyuseki, takes ordinary rocks found in a river bank near his home and adds his own bit of weird and funny alterations. He usually spends up to a month carving and decorating each of his stone pieces. As he chisels, Hirotoshi retains the original shape of the rock, then he adds accessories such as zippers, dentures, coins and other materials to complete the illusion. His creations are somewhat creepy, but they also bring laughs and smiles to the people who see them.
You can learn more about Hirotoshi and his work on his website.