The Aven Armand cave is located in Lozère to nearly 100 m deep.
It is named after its discoverer, Louis Armand, blacksmith Rozier, who went down the first 19 September 1897.
The main hall is 110 m long, 60 m wide to an average height of 45 m. It reveals a forest of more than 400 stalagmites. It includes, with its 30 m high, the largest stalagmite in the world known to date.
It is June 11, 1927 that the Aven Armand is arranged and accessible to the public through the opening of a tunnel 208 m long, gently sloping with steps. Today it is a cable car that used to go in the cave.
The future is composed of a central fireplace to the ceiling and a huge room on slopes. It is through this cavity that reached Louis Armand and his companions. In the background is a forest of gigantic stalagmites. The precipitous drop of water droplets in the form says "stack of plates" of some stalagmites. More generally, the different velocities of water explain the various forms of stalagmites (in draperies, in organs, vertical ...). The stalactites in the cave are small compared to other caves. Indeed, the high speed of water infiltration through the wall of the ceiling leaves little calcium deposits. Most of the limestone is deposited on and stalagmites.
The famous cave explorer Édouard-Alfred Martel had called at the time the site of "Dreams of Arabian Nights."