If I were to dig a hole from Barton to China (which Amy's dogs have attempted to do), I wouldn't end up in China. As you can see from the red dot on the right hand image, I would end up between Australia and Antarctica in the Pacific Indian Ocean. There is no spot in the U.S. where you could dig your way to China. Good tool for students (and me!). Play with it at If The Earth Were A Sandwich.
Update: Thank you, Andrew, for correcting my geography. _/\_/\_