Fort de Bourlémont, Military fort and museum in Mont-lès-Neufchâteau, France.

Fort de Bourlémont is a diamond-shaped fort built of earth-shielded masonry, entered over a drawbridge through an off-center gate beside a caponier. Its central barracks sit in sunken streets, surrounded by artillery batteries in a rough circle. The fort has 84 rooms and shelters in 91 locations, and includes a dedicated infirmary from its construction.

The fort was built between 1878 and 1881 as part of a broader defense network designed by General Séré de Rivières. Its purpose was to guard the rail and road routes near Neufchâteau and protect the region from potential military threats.

The fort's name recalls Bourlémont, the hill above Mont-lès-Neufchâteau where it stands. In 1887 Minister of War Georges Boulanger renamed it Fort Choiseul after General Claude Antoine Clériadus de Choiseul La Baume, born in Nancy; the name was to be carved on the entrance fronton, but the decree was revoked on 13 October 1887 and the fort kept its original name. Since 2000 the site has been run as the "fort aux énigmes", a family leisure park with riddle trails.

The fort is open during the warmer months and welcomes visitors daily, so it is best to check specific hours before arriving. Since most rooms are underground, wear comfortable shoes and prepare for cooler temperatures in the vaulted chambers.

The fort offers an interactive experience where visitors solve riddles about local plants and animals while exploring the underground chambers. This playful approach turns the visit into an engaging adventure that goes beyond typical museum exploration.