|Find the antipodal location for any map point|
If you dug straight down through the center of the Earth, where would you emerge? China? Don't be so sure! Check it out and see for yourself. This website uses Google Maps to calculate the exact opposite point to any original point on the Earth's surface.
If I tunneled down straight through the Earth, I'd come out within sailing distance of Perth. Unfortunately, the hole I dug to get there would drain the ocean, making sailing quite difficult.
Footnote: "A n t i p o d e" is pronounced AN-ti-pode, but the plural, "A n t i p o d e s" is pronounced an-TIP-uh-dees. Now YOU don't have to learn the hard way...