Earth Sandwich / City antipodes / Hong Kong Island
Antipode finder · Hong Kong
The antipode of
Hong Kong Island.
Draw a straight line from Hong Kong Island (22.26° N, 114.18° E) through the centre of the Earth and it comes out at 22.26° S, 65.82° W, on dry land in Argentina, 29 km from La Quiaca. An exact Earth sandwich is possible.
- Hong Kong Island
- 22.26° N, 114.18° E · about 40 m above sea level · 1,195,529 people
- Antipode
- 22.26° S, 65.82° W
- What is there
- Dry land in Argentina
- Nearest town
- La Quiaca, Argentina · 29 km from the antipode
- Nearest big city
- Santa Cruz de la Sierra · 569 km from the antipode
- Sandwich verdict
- EXACT land lies opposite land
- Elevation bonus
- +3,760 m (40 m here, 3,720 m there)
Can you make an Earth sandwich from Hong Kong Island?
Yes: an exact Earth sandwich. Hong Kong Island is one of the few large cities with dry land directly opposite it. The grid that verifies submissions rates the spot exact: put a slice down in Hong Kong Island and have a friend put one down 29 km from La Quiaca, Argentina at the same UTC minute, and the whole planet is the filling. The elevation bonus would be about 3,760 m: Hong Kong Island sits about 40 m above sea level and the other slice about 3,720 m above sea level.
How this was worked out: the antipode flips the latitude and moves the longitude by 180°. Land or sea comes from the OpenStreetMap coastline the map uses; the sandwich verdict and elevations come from the verifier's 0.2° grid (Natural Earth land, ETOPO 2022 relief); water names from Natural Earth; towns and populations from GeoNames. The city's position is GeoNames' point for it; a big city's suburbs spread tens of kilometres around that point, and the figures move with them. Generated 2026-09-29.