Antipodes

In geography, the antipode (/ænˈtɪpədiː/; back-formation from Ancient Greek: ἀντίποδες (antípodes), from ἀντί (antí, “opposite”) + πόδες (pódes), plural of πούς (poús, “foot”)) of any place on Earth is the point on the Earth's surface that is diametrically opposite to it. A pair of antipodes are two points that are antipodal /ænˈtɪpədəl/ to each other and are connected by a straight line running through the centre of the Earth. Such points are as far away from each other as possible, a great-circle distance of 10,800 nautical miles (20,000 km).

In the Northern Hemisphere, "the Antipodes" may be used to refer to Australia and New Zealand, and "Antipodeans" to their inhabitants. Geographically the antipodes of Britain and Ireland are in the Pacific Ocean, south of New Zealand. This gave rise to the name of the Antipodes Islands of New Zealand, which are close to the antipode of London at about 50°S 179°E / 50°S 179°E / -50; 179. The antipodes of Australia are in the North Atlantic Ocean, while parts of Spain, Portugal, and Morocco are antipodal to New Zealand.

...
Wikipedia