http://www.peakbagger.com/pbgeog/worldrev.aspx

>From the page:

Antipodes: The Other Side of the World

There is an informal and anecdotal belief among Americans that if you
dig a hole deep enough, eventually you would come out in China. This
is theoretically possible if the hole is angled in the right way, but
if you dig straight down and through the exact center of the earth
from anywhere in the 48 contiguous United States, you'd come out in
the Indian Ocean. Only in parts of Argentina or Chile would a straight
hole emerge in China.
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