Alright, I thought it would be cool to have a little contest. No prizes…sorry. But you will be mentioned on my site. (and maybe have featured artwork on blenderartists.org *hint *hint to makers of this site)
You will have to create 3d version of an Escher drawing. Simple as that.
Here is an example:
By the way, this is a pretty casual contest, so don’t take it too seriously.