Aven Armand is a show cave on the Causse Méjean, the wild limestone plateau at the heart of the Cévennes in France's Lozère department, 11 km from the village of Meyrueis and 21 km from Sainte-Énimie in the Gorges du Tarn. It takes its name from Louis Armand, a blacksmith at nearby Le Rozier, who reported the shaft to Édouard-Alfred Martel — one of the founders of modern speleology — on 18 September 1897 and was the first man down it the following day, with Armand Viré and Martel himself following over 20–21 September. What they found below the causse's dry surface was a single chamber of exceptional size, its floor crowded with stone.
The cave's single vast chamber, the Salle de la Grande Stalagmite, is roughly the size of a cathedral nave and holds what's known locally as the Forêt Vierge, or Virgin Forest: more than 400 stalagmites rising from the chamber floor, individual columns frequently reaching 15 to 20 metres. At its centre stands the Grande Stalagmite itself, generally cited as the tallest stalagmite inside any show cave open to the public — around 30 metres, built up over an estimated 300,000 to 400,000 years, one thin mineral layer at a time.
Today a funicular carries visitors 60 metres down through the rock in under two minutes, replacing the rope-and-ladder descent Armand and Martel first made. From the funicular's lower station, the guided Jules Verne tour leads on foot through the chamber and its forest of stone, at a constant c.12°C whatever the season outside. We handle the ticketing so your timed departure is confirmed before you arrive — one less thing to plan once you're out on the causse.