Grottes Baume de Gonvillars in Saulnot [Haute Saône].

Deep underground, a river flows in the rocky bottom. Not easy to reach that depth, but of an unprecedented beauty that makes the difficult descent very worthwhile. In the deep darkness, the only light is what was brought along, flashlights and flashes. And sometimes the picture is not visible until after the photo has been taken.

Underground river in Bèze [Haute Marne].

A beautiful silent cruise on an underground river in a boat without an engine, pulled by ropes on the ceiling. It always results in beautiful pictures.

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