FR-77. This natural arch is located on Mazet locality on the side of the Chassezac River on Gorges du Chassezac in Ardèche department of France. The opening has a measured span of 2.0 meters and has 4.0 meters in depth. IGN topographic map Top 25 number 2839 west Les Vans (pleat B8).



                      

     A small pothole arch about 1 meter span is located close by on the side of the Chassezac River.