These are images from the Eureka Tower in Melbourne, Australia.  Emery Studio (look at the "Placemaking" link) had the opportunity to use both the horizontal and vertical surfaces to design some anamorphic signage in the parking deck.  When viewed from the correct direction as you're driving, the words appear legible and lead you in the correct direction.  Viewed from another angle, the words appear as abstract lines and colors.

Thanks Ethyl for sending the link on Twitter!  Images are from the Kosmograd blog.