Drawings in red chalk in the underground quarry Herblay.
- Junction of the south passage.
- Martha Street.

The underground quarry Vic sur Aisne has been operated on several levels. They are clearly visible here.

In the underground quarry Ouache in Saint-Maximin. The support beams of the ceiling.

In the underground quarry Ouache in Saint-Maximin. The architecture of the corridors is very interesting.

Road vehicle traffic in the underground quarry of Gouvieux. The culture chambers are separated by masonry walls.

The royal workshop of the underground quarry Gouvieux is located at the end of an appendage of the network of galleries.

A very steep slope that leads to the exploitation level of the underground quarry. Here the picture is taken at mid-height of the slope.

A dispatcher distributes fresh air into the underground quarry, through the pipes.

At several places in the underground quarry, drawings of boats, very old.

In the underground quarry Ouache in Saint-Maximin. The plastic sheeting used to prevent drafts, for the cultivation of mushrooms.