Antarctica is the only continent with no countries on it. Seven states have filed territorial claims, most other states recognise none of them, and the whole arrangement has been frozen by treaty since 1961.
What the map shows instead is ice, a buried mountain range, and a handful of research stations. Here is how to read it.
The shape: two halves, one range
Antarctica covers about 14 million square kilometres, which makes it the fifth largest continent, ahead of Europe and Australia. The Transantarctic Mountains run right across it and split it into two unequal parts.
- East Antarctica is the large side, facing the Indian and Atlantic oceans. It sits on ancient continental rock, and the ice above it is thick and stable. This is where the highest, driest, coldest interior sits.
- West Antarctica is smaller and lower. Much of its bedrock lies below sea level, which makes the ice sheet there more sensitive to warming ocean water than the eastern one.
The Antarctic Peninsula reaches north from West Antarctica towards South America. It is the warmest part of the continent, the greenest in relative terms, and the destination of almost all tourist voyages.
What is under the ice
The ice sheet averages well over a kilometre in thickness and runs far deeper in places. Take it away and Antarctica would look nothing like the outline you know: a large eastern landmass, and an archipelago in the west.
Three features hide under there:
- The Gamburtsev Mountains, an entire range in East Antarctica the size of the European Alps, buried completely and mapped by radar rather than by sight.
- Subglacial lakes. Hundreds of them. Lake Vostok is the largest, sealed under roughly four kilometres of ice.
- Deep basins. Parts of the bedrock lie more than two kilometres below sea level, held down by the weight of the ice above.
The highest point above the ice is Vinson Massif, at roughly 4,892 metres, in the Ellsworth Mountains.
Ice shelves are not the coastline
A large share of what looks like land on a map of Antarctica is floating ice attached to the continent. These are the ice shelves, and two of them are enormous:
- The Ross Ice Shelf, on the Pacific side, roughly the size of France.
- The Ronne-Filchner Ice Shelf, on the Atlantic side.
Ice shelves float, so their melting does not raise sea level directly. They matter because they act as a brake on the glaciers behind them. Remove the shelf and the land ice flows faster into the sea, which does raise it.
The coastline on the map also moves. Icebergs the size of small countries break off, and the outline is redrawn.
The claims, and the treaty that suspended them
Seven countries have made territorial claims on Antarctica: Argentina, Australia, Chile, France, New Zealand, Norway and the United Kingdom. On a map these appear as wedges converging on the South Pole. Three of them overlap, on the Antarctic Peninsula, where Argentine, Chilean and British claims cover much of the same ground.
One wedge, Marie Byrd Land in West Antarctica, is claimed by nobody. It is the largest unclaimed territory on the planet.
The Antarctic Treaty, signed in 1959 and in force from 1961, put all of it on hold. Its core terms:
- The continent is reserved for peaceful purposes. No military bases, no weapons testing.
- Scientific research is free and results are shared.
- Existing claims are neither recognised nor rejected, and no new claim can be made while the treaty holds.
- A later protocol bans mineral resource activity other than research.
Stations, not cities
Nobody lives permanently on Antarctica. The population is a rotating group of researchers and support staff, larger in the southern summer and small through winter.
Three stations anchor most maps:
- Amundsen-Scott, run by the United States, sits at the geographic South Pole.
- McMurdo, on Ross Island, is the largest station and the main logistics hub.
- Vostok, a Russian station in East Antarctica, recorded the lowest natural air temperature ever measured on the surface of the Earth, close to minus 89 degrees Celsius.
The desert nobody expects
Antarctica is a desert. The interior receives very little precipitation, comparable to the driest hot deserts. The ice built up over millions of years because almost none of it melts, not because a lot of snow falls.
The McMurdo Dry Valleys take this further. Wind strips the snow away and leaves bare rock and soil, in some of the driest conditions found anywhere.
Where the wildlife sits on the map
Almost nothing lives inland. The interior ice holds no vertebrate life at all. Everything you associate with Antarctica sits on the coast or in the water around it.
- Emperor penguins breed on sea ice, mostly around the eastern coasts, and they are the only species that winters on the continent.
- Gentoo, Adelie and chinstrap penguins concentrate on the Peninsula and the nearby islands, which is why almost every voyage sees them.
- Seals and whales follow the krill, and the krill follow the nutrient-rich water that upwells around the continent.
The boundary that matters biologically is not the coastline but the Antarctic Convergence, a ring in the Southern Ocean where cold polar water meets warmer water from the north. Cross it and the species change. Most maps do not draw it, and it explains the ecosystem better than the ice edge does.
Getting there, for the few who do
Nearly all visitors arrive by ship from Ushuaia in Argentina, crossing the Drake Passage to the Antarctic Peninsula. The season runs from roughly November to March. Operators work under IAATO rules, which cap landing group sizes, set distances from wildlife and forbid leaving anything behind.
Two things to expect from the map before booking:
- You will see the Peninsula, not the continent. The interior and the Pole are reserved for expeditions and flights at another price entirely.
- The itinerary is a proposal. Ice and weather decide the landings, not the brochure.
For the far northern counterpart to this map, the Scandinavian and Arctic picture is at https://www.theglobaleyes.com/scandinavia-map-geography/, and the continent most voyages depart from is covered in this guide.
