Fortress of Mimoyecques - Credit: Wikimedia Commons
The Fortress of Mimoyecques () is the modern name for a Second World War underground military complex built by the forces of Nazi Germany between 1943 and 1944. It was intended to house a battery of fixed V-3 cannons permanently aimed at London, away. Originally codenamed Wiese ("Meadow") or Bauvorhaben 711 ("Construction Project 711"), it is located in the commune of Landrethun-le-Nord in the Pas-de-Calais region of northern France, near the hamlet of Mimoyecques about from Boulogne-sur-Mer. It was constructed by a mostly German workforce recruited from major engineering and mining concerns, augmented by prisoner-of-war slave labour. Read more on Wikipedia
Source: en.wikipedia.org