Places In Photos: 2016 On Earth As Seen From Space A.S. 0 The Richat structure is a naturally formed circular geological structure created through erodation in time; it is located in Mauritania. Photo: NASA/SPL/Barcroft Images Pages: 1 2 3 4 5 6 7 8 9 10 11 <1 ... 34 5 67 ... 11>
