".... the earth is flat, but I know that it is round, for I have seen the shadow on the moon..." - Ferdinand Magellan

I was doing some stumbling, and I found this amazing Google Earth feature on Map Tools. If you type in a location, you can see what is on the complete opposite side of the world. Figures; Massachusetts is opposite of Australia :-) 


Feel free to try it! You just have to zoom out a little.
               Tunnel to the Other Side