The Richat Structure, also known as the Eye of Sahara, is a unique geological formation situated in the Western Sahara desert in Mauritania.
I came across it while idly exploring the world with EO Browser. Our planet looks both beautiful and surreal when looked at from a distance.

Supposedly the structure was first thought to be the result of a meteorite impact. That’s also what I thought i was when I first saw it. However, further studies have shown that it is not an impact crater, but rather what is known as a geologic dome.