One of the most interesting plates of the official ossuary. This part of the catacombs is hidden to the public.
It is inscribed "Catacombs low" while the corridor descends into a lower part of the quarry. The bones are placed in bulk.

Quarries of Paris

Quarries of Paris

Quarries of Paris

A technical galery connected to an railway abandonned (the loop) around Paris.

The lower level of the underground quarry of Port Mahon.

A forest of pillars in the lower level of the quarry of Port Mahon.

A technical galery connected to an railway abandonned (the loop) around Paris.

The limestone quarry of Chanaz is a smaller operating on three levels. The ceiling height is between 5 and 10m. Sometimes, holes in the floor let you see underground levels.

The network size is almost 4km developed. It was exploited from 1860 to the end of the Second World War to make cement. Portions was reused as mushroom farm thereafter (row crops and cultures in bags).

In this photo taken at the highest level, we see the intermediate level, row crop bottom right and even two holes overlooking the lower level. This is the most impressive part of the network with large volumes!

A view down to the lower level of the limestone quarry Chanaz.