The construction of Fort Rimplas began in 1928, shortly after Mussolini's claims concerning the district of Nice. The Organising Committee of the Regions Fortress (CORF) without knowledge of military equipment to be integrated into the fort, the work was long and subject to many changes. The 74th Brigade Alpine Fortress takes possession of the premises in 1937, although the work is still not completed. During the Second World War, its use has been anecdotal.

An association founded in early 2008, "Friends of the Work of the Maginot Madeleine," began the rehabilitation work inside and outside and opened the door to work at the Days of Heritage 2009.

source: website of the association(FR)

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

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

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

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.