25 Unique Natural Wonders That Look Like They Belong on Another Planet
16. The Richat Structure (Eye of the Sahara), Mauritania
Imagine a colossal bull's-eye etched into the vast, ochre landscape of the Sahara Desert, visible only from space. The Richat Structure, often called the "Eye of the Sahara," is a deeply eroded, 50-kilometer-wide dome, revealing concentric rings of rock of different ages. Its origin, once a mystery debated as an impact crater, is now widely accepted as a deeply eroded dome. Its striking circularity and immense scale create an unearthly pattern, a geological fingerprint that feels more like a planetary landmark than an earthly one, beckoning contemplation of Earth's ancient, shifting crust.
