If you were an astronaut and you decided to take a brake and look at the Sahara Desert of Mauritania, you would be shocked of the image you see. First you would think it's some illusion or that you are tired of hard trip but soon you would realize that it really looks like a big human eye. That's right...that eye also has name and it's called EYE OF AFRICA.
This incredible structures was made due symmetrical uplifting of underlying geology and after thousands of years of erosion its visible now. This strange phenomenon of blue eye is actually a Richat structure that resembles an eye from space.
However this natural phenomenon is so amazing and great welcome message that helps bring back our astronauts home.