This photography was shot from the ground. In the center, you can see one of the highest room in the monument.

This room is one of the largest of the underground quarry sand. Its length is over 20m. The pillars of wood supporting structures are now as fragile as paper.
However, the ceiling is very strong. While the underground quarry remains wet sand stays compact. There was very little collapse since I know her.

A crazy man who sculpts for years in quarry began his next room. At the time of the shooting, he was going to sculpt on the ceiling a map of the quarry.

Quarries of Paris - Showroom mineralogy of the Rue Saint Jacques.

The showroom mineralogical most famous of Paris is the Salle Saint-Jacques. It was constructed by Major Gambier in the heart of the underground quarry system of the GRS (Great South network), just false catacombs at Denfert-Rochereau, in fact ossuaries in old underground quarries.

The side benches were used to display the site's geological curiosities. At the center of the room, a staircase dummy materialized superposition of limestone beds of the place. Each step was a sample. Originally, the name of each geological layer of rock was inscribed on the front steps of each room but this was very bumpy because too many visitors have visited illegal.

Can be found in certain geological showroom more difficult to access such information.

source: website of Zedou(FR)

The stairs cross of the peak battery. The corridor down the room leads to the research center, while the two others leads to the main ramparts.

Quarries of Paris - The fountain of the Chartreux.

The Fountain Room of the Carthusians was built in 1819. The order of Carthusian monks had disappeared during the French Revolution. There is a magnificent double staircase which gives access to the fountain. Further, a low water level is used to measure the height variations of the water table. The fountain was built by the Inspectorate General of underground quarries to supply water to underground workers.nterirdischen Steinbrüche gebaut, um Wasser in die U-Arbeiter zu versorgen.

An isolation room, in the psychiatric hospital.

The laundry room scraps of stationery.

The ground is very soft. On the left, a small room, very usefull to rest before visiting the all quarry.

The entrance to the left of a small rest room in the underground quarry quarrymen called Jaguar Port-Marly.