The Durand Group Are a fraternal association of individuals who have voluntarily undertaken to work together to further research and investigation of military-related subterranean features including: military mining systems; tunnels; subways; dugouts and bunkers; and other underground structures.
Maison Blanche Souterraine As far as the coast and south down to the regions of the Champagne, Loire and Seine, numerous underground workings, some of considerable depth, exist. These were either underground quarries or places of refuge for the inhabitants during earlier troubled times. They were again Used for shelter during the First World War.
Location: Loos en Gohelle, Pas de Calais, France. Excavation and investigation of a British multi-level tunnel system containing listening and fighting galleries, a brigade battle headquarters and several internal and external Shafts.