1) Racetrack Playa, United States
Racetrack Playa is located in the Death Valley, California and it is one of the flattest places in the world. In winter there are rains in the desert making the surface slippery. During those times, stones are moving there leaving clear tracks behind. It is believed that the winds are responsible for this weird phenomenon, but the rocks are never filmed or pictured while moving. We can do nothing but wonder why in age of high technology there are no shots from this place.
2) Eye of Africa, Mauritania
Visitors can not see too much by going there, but traveling with Google Earth offers an image that takes the breath. These weird cliffs shaped like human eye are located in Mauritania. There are several theories that try to explain the origin of this wonder, but the official one is that it is a richat structure formed by symmetrical uplifting of the geology. One of the others says that a meteor is the reason.
