A point exactly on the other side of the world is called an antipode.

Contrary to popular belief, China is not on the other side of the US, the Indian Ocean is.

About 71% of the Earth's surface is water, and only 4.4% has land on both sides.

Here are a few of the most interesting examples:

• Gatteville-le-Phare(France) ↔ Antipode Island (New Zealand)
• Hawaii ↔ Botswana
• Madrid (Spain) ↔ Weber (New Zealand)
• Taiwan ↔ Formosa region (Argentiga)
• French Southern and Antarctic lands ↔ Medicine Hat (Canada)
• Perth (Australia) ↔ Bermuda