Wolf's Gorge I (Hitler Bunker)

Führerhauptquartier Wolfsschlucht I was the codename for one of Adolf Hitler's military headquarters, located in a farmhouse of the Belgian village of Brûly-de-Pesche, in the municipality of Couvin, close to the French border. It was occupied by Hitler between 6–24 June 1940 while awaiting the conclusion of the Battle of France.

Source: Wikipedia