The underground quarry has 12 Gouvieux pasteurization chamber like this. The entire room was behaving like an oven. The heating system is on the side, out of the room.

The room Richelieu French comedy is a theater built by the Italian architect Victor Louis in 1799. He can accommodate 800 spectators.

First visit in the french comedy. It was very hard to light the room with our small LED light...

The most far-reaching element of the career. In truth, the room seem even larger. Very impressive!

There is 5 rooms like this under the big dome of the opera Garnier.

In the main repetition danse room, under the big dome.

In the quarry of Meudon Montalets. The five quarry levels.

We used to come to rest in this beautiful round room during our visits to the quarry. The hole in the center of the room no longer exists. At left, behind the door, there's a view of the corridor from the heights.

On the ceiling there is a site for a large beam. There was probably a winch.

This room is located under the last dome. Its blue is very pretty.

Control Room of the NATO radar base, the fort of Mount Salbert.

Fort Lefebvre culminates at the top of Mount Salbert 650m altitude. It said a strong "Sere River". It was built from 1874 to 1877. On May 12, 1955, NATO reuses the fort to house a communications center and a radar base. The book is officially delivered to the Air Force ole March 26, 1958. The book "G" Air Defense Planning (DAT) has 7 radio antennas. The old fort is used as a barracks for soldiers.

The radar base is not exactly the strong, but under the fort. Access from the fort is a long staircase of 322 stairs that descends into a concrete wall strongly.

The site is no longer running quickly but it remains occupied by the army until 1972. The mayor of Belfort is the current owner. It secures the site is now a promenade.