This is open to interpretation, of course. You could go with something anywhere in the other hemisphere, or you could look at a globe and make your best guess where you'd come out if you tunneled through the planet.
Or you could try for something more precise and use an antipode calculator. Like this one: https://www.antipodesmap.com/. That's what I did. Of course, it dumped me in the middle of an ocean. But the nearest bit of land that I could find a book for was a French archipelago, so I will be reading L'Arche des Kerguelen: Voyage aux îles de la Désolation.
Or you could try for something more precise and use an antipode calculator. Like this one: https://www.antipodesmap.com/. That's what I did. Of course, it dumped me in the middle of an ocean. But the nearest bit of land that I could find a book for was a French archipelago, so I will be reading L'Arche des Kerguelen: Voyage aux îles de la Désolation.