The Story Behind Ngorongoro: How a Volcano Became a Wildlife Wonder

The story of the Ngorongoro Crater began around two to three million years ago with a huge volcano, which some scientists believe may once have been nearly as tall as Kilimanjaro. Then it collapsed in on itself, leaving the vast bowl you drive into today.

What Happened

The volcano didn't blow itself apart. Its giant magma chamber emptied, and the summit sank downwards, forming a caldera about 260 square kilometers across. It is the largest unbroken, unflooded volcanic caldera in the world.

Why the Shape Matters

That enclosed bowl is what makes Ngorongoro so special. Elsewhere, animals spread out with the seasons, but here walls up to 600 meters high help keep a large, mostly resident population of wildlife on the crater floor all year.

A World of Its Own

Grassland, swamps, patches of forest and a soda lake all fit inside the crater. They support wildebeest, zebra, buffalo, lions and one of Tanzania's most dependable black rhino populations.

Ngorongoro Today

The crater is part of a UNESCO World Heritage Site and a conservation area where wildlife protection and Maasai grazing rights exist side by side, a careful balance that is still evolving.