Cascade du Sautadet - La Roque sur Ceze - 09, Apr - 06
Quoting gard-provencal: "The Ceze has carved out channels and cavities in the rock. They meet and form crevasses which the river rushes into. The most spectacular features are [...] cylindrical cavities (some are several meters wide) hollowed out in the rocky riverbed by the swirling movement of the pebbles." (more photos and a video).