Ex U-Boot-Bunker Martha, World War II naval bunker in Marseille, France
The concrete submarine bunker stretches 250 meters in length and contains 13 docks designed to shelter German U-boats during military operations.
Construction of this Mediterranean naval base began under German occupation, facing substantial damage from Allied bombing raids on December 2, 1943.
The structure stands as a testament to wartime engineering and now functions as a modern data center, bridging military history with technological advancement.
Located at coordinates 43.338556, 5.346583, the bunker sits near the Memorial Victims Liberation Marseille and Commonwealth War Cemetery Mazargues.
Due to harbor expansion projects over the decades, this massive submarine shelter now stands disconnected from the Mediterranean waters it once served.
Location: Marseille
Length: 208 m
Width: 45 m
Operator: Digital Realty
GPS coordinates: 43.33856,5.34658
Latest update: May 25, 2025 14:20
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