The magnificient Pont d'Arc
has several natural opening located around the natural bridge on left and right abtument, on the top, on the side and under it. This first arch about 2.5 meters span is situated under Pont d'arc on the left bank orographic. By land, the opening is accessible without getting your feet wet by a narrow underground passage. By the river, on canoe or swim.
This other opening is located also on the left abutment of Pont d'Arc and can be visible only at low water flow of Ardèche river. These two arches are the evidence about the widening of Pont d'Arc.
This natural well open on the middle of the west face of Pont d'Arc and have an estimated depth of 20 meters. It emerge near the top of the natural bridge.
This opening about 13 meters of depth is located up on the cliff of Pont d'Arc on the right bank orographic.
These four other small natural arches are located under Pont d'Arc.
Another example of a pierced cave located on the side of Chassezac River on the area of Casteljau.