The antipodal point for any place on Earth, (or any spherical object), is the spot diametrically opposite. In cartoons and folk lore, you end up in China if you dig through to the other side of the world by way of the center of the Earth.
1) Where would you be living, if your antipodal point was in China?
2) What is the antipodal point of Toronto? (relative to a city or land mass, if it's in a body of water). Within 500 miles is good enough to get this right.
@Blue-Spheroid: Yes, Earth is not a sphere, but it's close enough for the purposes of these questions.