A beautiful writing in the second underground level of the quarry of Port Mahon.

This quarry is as beautiful as dangerous. The oxygen level can be low as 13%. It's very low, be carefull.

A beautiful gallery carved into the tuff of Clermont. Strata are clearly visible.

The colors of ocher quarries is still beautiful.

A beautiful underground sandpit, on two levels.

A beautiful view of the Paris Observatory, since the crane.

High on the right side, a small area with beautiful pillars.

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

In the storage zone, where germans use to built V1 missiles, a beautiful and fragile wood door.

Mushroom area in a gypsum quarry, exploited on stacks

The SEBILLOTTE quarry was operated from 1838 until 1940. Then, the quarry has been used for growing mushrooms until 1960. There are still beautiful mushroom beds in most rooms of operation.