Guelb er Richat (aka the Richat Structure or the Eye of the Sahara) is eyepopping when seen from space. How is it to see it from the ground? You'll have to travel deep into Mauritania's desert to ...

From an altitude of 255 miles, an Expedition 59 crewmember photographed the Richat Structure, or the “Eye of the Sahara,” in northwestern Mauritania. The circular geologic feature is thought ...

For millennia, the Eye of the Sahara was hiding in plain sight. That's because this huge and mysterious geologic formation is hard to spot from ground level, walking around on Earth. It turns out ...

Estimates of the Eye of the Sahara's dimensions range from 25 to 31 miles (40 to 50 kilometers) in diameter. The eye forms a near-perfect circle in the desert of Mauritania, which initially led ...

This striking astronaut photo shows off an "eye-catching" impact crater in the Sahara Desert. The oculus-like structure is surrounded by migrating sand dunes that are capable of traveling more ...

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 ...

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 ...

In the western Sahara Desert lies a natural wonder that has intrigued scientists and adventurers for centuries. Known as the Richat Structure — or, more commonly, the Eye of the Sahara — this massive ...

NASA’s Goddard Space Flight Center decided to kick a hornet’s nest July 16 when it shared an image of one of Earth’s most debated oddities. Known as the Richat Structure, the formation is a ...