This is a
stereoscopic 3D image.
3D Weddings
To view it in 3D without special glasses, open to the largest size that fits both images on your screen. Keeping your head perfectly level, look at the white space between the images and gradually cross your eyes until the two images become one. (There will be two blurry images either side) The resulting feeling of space is quite amazing and beautiful. You'll also become aware of more detail in the 3D image than you noticed in the two 2D images.
If you can't get it, be patient, the result is worth it. Many people have difficulty doing this, and if so try starting with the small image above, then move onto larger images.
