One of the longest corridor in the NATO bunker, toward the exit.

A huge ventilation pipe in the bunker under the NATO Fort Salbert Mt.

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.

A huge tank, probably deflagrated by a military charge...

One of the tanks on the top floor, with plumbing. It is assumed that this was the source of drinking water from underground center.