Remember when you were young and you thought, I could dig a hole in my backyard all the way to China? Well, according to this website, it's a good thing you didn't dig. Because you would have gotten wet -- that assumes you live within a few hundred miles of our house. Click on DigHoles.com, and it shows you where the hole would come out if you decided to dig clear through the earth.
Of course, it doesn't take into consideration the heat of the earth's core, but then, what kid would think about that?