On the ground, its rings are hard to appreciate; dunes, heat haze, and uneven terrain all conspire to hide the full shape.

Hidden in the golden sands of the Sahara Desert lies a geological marvel that has captured the attention of astronauts and ...

Deep within the western Sahara Desert in Mauritania, there is one of the world's natural wonders: the Eye of Sahara, or rather, the Richat Structure. Such a structure is immense and takes the shape of ...

European Space Agency's satellite capture shows the Richat Structure in unprecedented clarity, revealing vivid rings across ...

At close to 50 kilometers in diameter, the Sahara Desert’s sprawling Richat Structure is one of the most mysterious geological features on Earth. Via NASA: Once thought to be an impact crater, the ...

The circular formation in this photo is the Richat Structure of Mauritania, which “has captured the attention of astronauts for about as long as NASA has sent humans into orbit around Earth.” ...

Astronauts aboard the International Space Station captured this image of a huge crater in Africa on Nov. 22, 2014. This is the Richat Structure in northwestern Mauritania, otherwise known as the “Eye ...

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There are many mysterious places around the world that boggle the mind. If you dig deep enough, many of them have logical explanations for their existence. Others are the subjects of myths and legends ...