This indeed has to be the most beautiful ring ever on the surface of this planet. The Richat Structure is a prominent circular feature in the Sahara desert lying in the west-central Mauritania near Ouadane. This place should definitely be on the top of your must visit places.
9. Cano Cristales, Serrania De La Macarena, Province Of Meta
This looks so Pretty. Rainbow on land. Cano Cristales, a biological wonder on the earth will show the stunning picture of various colors. The world knows this place by “The river of five colors”, “the river of paradise” and “world’s most beautiful river”.