Docks

The strategic location of Saint-Nazaire led the Germans to build a huge submarine base there during World War 2.

The construction of this base began at the beginning of 1941. The base was 300 metres long and 150 metres wide, and 450,000 cubic metres of concrete were needed to build it. It contained 14 cells: 8 for repairs and 6 larger cells in which the submarines could remain afloat. It housed two U-Boat fleets. It spread over a total surface area of 4 hectares and its concrete ceiling was 4 metres thick.

I c&c that from
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So here is a little serie about this huge submarine base, i tried straigth b&w with lightroom, maybe i'll submit one to "Monocolour Madness Contest"
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