My someday dream house will have many things. A sleeping porch for the summer months. Secret passageways for my grandchildren to find. And a different door in every doorway. However, until that house comes to be and I have the resources to buy all of the doors I want, these decals from style-your-door.com just might do the trick.
I'm not entirely sure how the illusion would work with a doorknob on there, but it's still a very cool idea. I also like these outdoor options: