This lovely sun-like formation is actually a drained wetland, per Anthony Quigley’s caption:
The Étang de Montady (or the "pond of Montady") is a former freshwater wetland that was drained by monks during the second half of the 13th century. The Étang de Montady is near Colombiers, midway between Béziers and Narbonne, in the western department of Hérault, in southern France. The area was drained by making radial ditches from a single center point out to the extremities. The water flows to this center point and is then drained through an underground culvert and through the Malpas hill and under the Malpas Tunnel of the Canal du Midi.
Same plot, different angle:
(See all Orbital Views here)