This mysterious pattern in the Sahara desert is a land art project created in 1997 by the D.A.ST. Arteam called "Desert Breath".
It stretches over 100,000 m2 and 8,000 m3 of sand had to be moved to create the cones. The centre is a 30-metre diameter vessel filled with water.
"The project is rooted in the team’s mutual desire to work in the desert. For D.A.ST. the desert was a place where one experiences infinity. They were addressing the desert as a state of mind, a landscape of the mind. The point of departure was the conical form, the natural formation of the sand as a material."
Over time it is slowly disintegrating, but still looks very impressive today. See it on google maps here: Click