Lager Koralle, Underground military bunker in Bernau bei Berlin, Germany.
Lager Koralle is an underground bunker complex located in Bernau near Berlin with multiple levels built deep beneath the surface. The facility features reinforced concrete chambers, interconnected tunnels, command spaces, and accommodation areas that form a self-contained underground network.
The bunker complex was constructed during World War II and served as headquarters for the German Navy. Commands were issued from this location to submarine fleets, and naval operations across the seas were coordinated from underground.
The site shows how military power and engineering merged during wartime, with structures that still carry traces of this connection today. Visitors can observe how builders of that era used concrete and steel to create underground spaces designed to protect people and operations.
Access to the site requires advance permission and is not available for casual visitors. A powerful flashlight or headlamp is essential since the underground sections are completely dark.
The facility was equipped with an advanced radio system that maintained direct communication with submarines operating across the world's oceans. Four large transmission masts worked together on the grounds to make this global communication network function.
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