A slightly difficult one here.
This structure is a slightly eroded dome that is 40 km in diameter. It’s claim to fame, among others, is that it is visible to the naked eye from outer space, and has often been used by astronauts for reference. Although it is politically in the country of Mauritania, geographically it is within a much larger land feature. As a result, the depicted formation, also called the Richat or Ritchat Structure, gets its more popular name.
Enough hints. Identify the structure, and without the help of search engines or other internet tools, please.
Happy quizzing, and have a nice life, folks!
Five replies and all correct! This structure is indeed referred to as the “Eye of the Sahara”.