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.
The map on this page allows you to approximately locate the place directly on the other side of the world from anywhere. The complementary red and black outlines are reversed, so that a place in the right place on the black outline map is directly opposite the place on the red outlines. The red outline map is "upside down", with south at the top . . .
I love maps. :)
