Aven Armand, Show cave in Hures-la-Parade, Lozère, France

Aven Armand is a limestone cave whose main chamber, the Grand Salle, lies 100 metres below the surface and measures 110 metres long, 60 metres wide and 45 metres high on average. Its floor holds over 400 stalagmites, including one 30 metres tall, while stalactites remain small because water infiltrates the ceiling quickly.

Louis Armand, a blacksmith from Le Rozier, made the first descent on 19 September 1897 with Édouard-Alfred Martel and Armand Viré, entering through the natural shaft. In 1927 a 208-metre sloping tunnel with steps opened the cave to the public, and since 1963 a funicular has replaced the stair climb. The site was classified on 20 August 1941.

The cave is named after Louis Armand, a blacksmith from Le Rozier who first descended on 19 September 1897 with Édouard-Alfred Martel and Armand Viré. In June 2017 Nolwenn Leroy filmed the music video for her single "Gemme" inside the Grand Salle, and in 2014 the cave appeared in the TV film Crime en Lozère.

A funicular railway system transports visitors down from the entrance building into the cave chamber, making access easy without strenuous climbing. Well-marked pathways and clear signage guide visitors through the chamber, suitable for most people regardless of fitness level.

The Grand Salle's forest holds more than 400 stalagmites, and its tallest rises 30 metres, among the highest in Europe. Stalactites here stay small because water seeps quickly through the ceiling, so most calcite builds up on the floor instead.