Earth as a sandwich

link to ze frank's sandwich tool

As silly as this app might be, I played with it for at least 15 minutes, completely fascinated with observing what's on the opposite side. Beyond the novelty, the ability to observe immediately what the exact opposite geo-location is was gratifying two ways. One was resolving once and for all where I would have ended up had I been able to dig a hole to China, (~1500 km due east of New Zealand). The other was the ability to highlight the three dimensions of the planet through a two dimensional format, by simply implying an axis across two windows.