The cave of the Dragon is a former quarry that has been fought between German and french during the offensive of 1917
You have to take your car to visit the cave of the Dragon (it's in the middle of nowhere). There is a parking lot in front of the entrance. Be careful you can't visit the cave by yourself it's a guided tour, The visit starts every 15 or 30 minutes depending on the attendance. The fee is 8 euros. The tour takes 1 h 30. Beware there is not really a restaurant in the museum you need to take your car to go to a restaurant.
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