"Maybach I" bunker complex

Maybach I and II were a series of above and underground bunkers built 20 kilometres south of Berlin in Wünsdorf near Zossen, Brandenburg, to house the High Command of the Army and the Supreme Command of the Armed Forces during the Second World War. Along with the military fortress complex Zossen, Maybach I and II were instrumental locations from which central planning for field operations of the Wehrmacht took place, and they provided a key connection between Berlin’s military and civilian leadership to the front lines of battle. The complex was named after the Maybach automobile engine.

Location of Maybach I: 52.1934°N 13.4733°E / 52.1934; 13.4733Location of Maybach II: 52.1826°N 13.4741°E / 52.1826; 13.4741

Source: Wikipedia