Thomas R. answered 05/02/18
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I was always interested in this sort of question, so I ran to a site that finds antipodal points on a map. It turns out my home is is antipodal to the Australian coast. Go figure! You don't need a fancy website, though. Just change north to south (or south to north) in any latitude you encounter, then subtract your longitude from 180° and again switch east with west or vice versus.