The exact image I linked to is of particular interest. Here you can see something in 3D that you couldn't possibly tell just looking at the originals - that you're actually looking off a cliff edge. The landscape seen past the horizon of the cliff edge is clearly much farther off when viewing the combined image.

Here's a copy in case the original site gets overloaded: http://imageshack.us/a/img829/3783/t6cftimgur.jpg