1. The Eye of the Sahara, also known as the Richter Structure, is located in Mauritania in the southwest of the Sahara Desert in Africa. Its diameter is 48 kilometers, and it is clearly visible from space.
2. At first, the terrain was thought to be formed due to meteorite collision. At present, geologists believe that it may be caused by the rise or erosion of geological structure. The formation of this annular shape is still a mystery.
