Interesting reading, I would love to know where this is .....
http://www.dailymail.co.uk/news/article-2138544/Inside-Frances-secret-World-War-I-bunker-Urban-explorers-wartime-weapons-stowed-away-underground-quarry.html
http://www.dailymail.co.uk/news/article-2138544/Inside-Frances-secret-World-War-I-bunker-Urban-explorers-wartime-weapons-stowed-away-underground-quarry.html