This passage was cut through a pillar for the passage of vehicles, after a portion of the quarry was rendered inaccessible by worksites on the surface.

The whole cathedral is reinforced by these metal rods. Locally, the buttresses have pillars of sites to prevent movement. Height Gothic heart of 48.5 m world record!

One of the beautiful pond in the Herblay quarry, with some cool arm-pillars around.

A small ossuary under the cemetery of Kremlin Bicetre. The bones are piled into a former quarry. They are not numerous, suggesting that they come from concessions not renewed. It remains a part of the quarry particularly pretty, with
beautiful arm pillars.

Quarries of Herblay are over 14km wide and some hundreds of meters deep, on hillsides along the Seine.

In 1776, the exploitation of new underground quarries in Paris was forbidden. People had to take the stone elsewhere. It is for this reason that the quarry was known as "Imperial quarry" or "Quarry of the city of Paris". They built many monuments in Paris with this stone because it was high quality (the famous Royal stone).

Among the monuments built, there was The Pantheon of Paris, Department of Marine Place de la Concorde, the Gare de l'Est, the mint as well as many statues at Versailles.

The network's quarries has been excessively exploited in Herblay. The ceiling is fragile and the walls separating the tunnels are very thin. To reinforce the quarry, they have added many pillars and reinforcement structures.

Later, like many underground quarries, they served to mushroom plantation in the 1980s. The workers have dug additional corridors between small quarries networks.

A few years later and they were gradually abandoned. The latest mushroom plantation closed in 1995.

Since 2003, the association "Herblay heritage" has undertaken to make public visits to the part of the "English entry" with the famous double-arched vault and pretty ponds.

Like many industrial buildings, the warehouses of the ICC (International Chamber of Commerce and Industry) have been constructed to withstand heavy loads. Both buildings have followed the trend of increasing concrete, early twentieth century. In the manner of some cathedrals, the lower floors boast a strong and massive concrete pillars whose diameter decreases gradually with height in stages. This is especially evident when one observes the facade from below.

Originally, these warehouses were used to store grain and flour. In taking possession in 1929, the ICC enjoys a strategic investment (The Ourcq channel, railway) and modernized the building to add elevators, more capable than the old mobile cranes to the variety of Goods transiting.

Note: This building was the setting for the movie Dobermann by Jan Kounen (nightclub on the docks).

On the new map of CB31 evacuation of the tower, we recognize the pillars of triangular shape. Before the big renovation site of the tower, these pillars were outside of the structure.

As can be seen regularly written on the pillars, this very orthonormal quarry is numbered. Here, a small pond and a referral to the delight of most visitors photographers.

Those pillars are very modern.

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.