On the outskirts of Poix de Picardie on the D901 lies a disused chalk quarry. It is unusually built on three levels; the original entrance is believed to be a now lost drift entrance from the other side of the main road.
In World War II, an adjacent building was taken over for use as a German Kommandantur (military headquarters). The disused quarry was reinforced for use as a protected shelter and possible uses include a communications centre, armoury or underground hospital. It is not clear what entrance was used during this period but the Germans also installed an emergency access laddered shaft to the middle level (around 14 metres deep).
On the plateau above the town of Poix de Picardie was an Allied airfield that was taken over and used by the Germans. It is not believed that the bunker complex was connected to the airfield activities.