Kahl-Burg, World War II bunker in Le Tréport, France.
This extensive underground fortification extends 270 meters through the chalk cliffs, featuring 32 rooms across four levels connected by corridors carved directly into the rock face.
Built in 1942 by the German Organization Todt as part of the Atlantic Wall coastal defense system, the bunker served as a command post for the 245th and 348th infantry divisions.
The site preserves wartime military architecture including original artillery pieces, defensive positions, and living quarters that housed approximately 60 soldiers during the occupation period.
Guided tours are available during heritage days and commemorative events like May 8th and November 11th, with advance booking possible throughout the year for group visits.
The bunker incorporates bricks salvaged from the demolished Hotel Trianon and features a 1907 Belgian artillery piece captured and repurposed by German forces during the war.
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