The submarine base of Saint-Nazaire is one of five large fortified U-boat pens built by Germany during the Second World War in occupied Saint-Nazaire, France.
Wikipedia https://en.wikipedia.org/wiki/Saint-Nazaire_submarine_base
More information at mairie-saintnazaire.fr http://www.mairie-saintnazaire.fr/eng/the-submarine-base/
Address Saint-Nazaire 44600, France
Coordinates 47°16'33.404" N -2°12'9.381" E
