Did you hear about the architect who built National Treasure-style puzzles into this family's Fifth Avenue luxury apartment without them knowing? It was months before they noticed and started deciphering things.
http://www.nytimes.com/2008/06/12/garden/12puzzle.html?_r=1&no_interstitial&oref=slogin Crazy cool. When I get rich one day, I'm definitely hiring this guy.