I was at my friend's place for a couple of hours before sundown. I shot this cross-eye 3D photo of a tree I saw there. Cross your eyes while looking at the photo and focus on the third photo (in the middle). It should look 3D!
Editing: Photoshop, Camera Raw, Color Efex Pro.
If you have not practiced crossing your eyes to view photos like these, here is a link on how to do it.