What would be the shortest route between Entre Rios in Argentina and the Chinese metropolis Shanghai? Simply a straight line through the center of the earth, since the two places are antipodes: they are located diametrically opposite to each other on the earth's surface.
¡Vivan las antípodas!
On opposite sides of the globe, Entre Rios in Argentina and Shanghai, China occupy unique antipodal positions, with a hypothetical straight line connecting them piercing the Earth's center.