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Physiographic Regions

Filter: All Continents World Subregions Cultural & Historical Regions Physiographic Regions
Rank by: A–Z Area (sq mi) Population Length (mi) Elevation (ft)

18 entries

Amazonia

The basin, the forest, and the flying rivers they make

Patagonia

Wind, ice, and the emptiest end of the Americas

Siberia

A tenth of the world's land, and the ground beneath it is thawing

The Arabian Peninsula

The largest peninsula on Earth, and it has no rivers

The Arctic

The circumpolar north, warming four times faster than the world

The Australian Outback

Seventy percent of a continent, and almost nobody in it

The Congo Basin

The second great rainforest, and the peat beneath it

The Eurasian Steppe

The grass corridor that carried empires from Hungary to Manchuria

The Great Plains

The grass built the soil, and the plow found out

The Great Rift Valley

A continent tearing in two, and the trench it leaves behind

The Iberian Peninsula

A high, dry tableland walled off by the Pyrenees

The Indo-Gangetic Plain

The debris of the Himalayas, and a billion people living on it

The Mediterranean Basin

A rare climate, an inland sea, and five thousand years of use

The Nile Valley

A green ribbon through the desert, holding a hundred million people

The Pampas

Soil deep enough to feed continents, flat enough to bore a surveyor

The Ring of Fire

The Pacific rim of subduction, where the ground does not hold still

The Sahel

The semi-arid belt where the Sahara frays into savanna

The Yucatan Peninsula

A limestone shelf, a buried crater, and water only underground