Pyrénées-Atlantiques in France. 660 metres (2,170 ft) of mined tunnel leads into the Salle de la Verna, the largest chamber in a show cave in the world. It has a diameter
de Saint-Émilion. Retrieved 4 April 2023. Michelle Gaborit, “L’église souterraine de Saint-Émilion” (Congrès archéologique de France, 145e session, Bordelais
Sulpice. The priory also included a Romanesque building, probably a "Grande Salle", built in the Middle Ages, of which only vestiges remain. Towards the mid-16th
However, the latest thinking is that the RCEA will be re-routed from LaSouterraine south down the A20 to Limoges and then via upgraded to the N520/N141