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

In the underground quarry Ouache in Saint-Maximin. Mushroom cultivation.

Setting up a photo exhibition in the underground quarry of Saint-Leu d'Esserent by Arnaud.

Photo by G. Arnaud. The photographs can be viewed on the personal website.

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

In the assembly area V1 missiles underground quarry of Saint Leu Esserent. The cabinets were probably used to store the heads of the missiles.

Quarries of Paris - The mineralogical showroom of Saint Jacques

The small ring of Paris just before the sun rises ...

Map of the Saint-Michel quarry.

Quarries of Paris - The mineralogical showroom on Rue Saint Jacques.

The most famous staircase of Paris. One of the showroom mineralogical layers of Rue Saint Jacques. It has been degraded and restored many times. One thing is sure. It was there before us. It will be there after (even for the weak).

On the curtains of the church Saint-Gervais in Paris.