Atlantikwall Regelbau 666 - Bunker for Infantry Observation Post with Sm...

Atlantikwall Regelbau 666 bunker Type is Infantry observation post (Beobachtungsstände) with small turret from the second world war,
the iron turret have be removed, blasted the turret off.

Using DJI Mavic Mini Drone - DJIMini

This bunker Type was designed by the Luftwaffe for 'German Air Force'.

how is a Regelbau
Before and during World War II, the Wehrmacht built several standardised bunkers and weapon positions in Germany and German-occupied countries. These buildings were called Regelbau, i.e. standardised buildings.

The Regelbau (German for "standard design") were a series of standardised bunker designs built in large numbers by the Germans in the Siegfried Line (German: Westwall) and the Atlantic Wall as part of their defensive fortifications prior to and during the Second World War.

Following the occupation of German territories west of the Rhine, fortress engineers began the construction of the Siegfried Line in 1936. In doing so they were able to benefit from their earlier experience of bunker construction. In compliance with the Versailles Treaty, they had already built the Wetterau-Main-Tauber position and Neckar-Enz position before 1936. When, in 1936, construction started on the Siegfried Line itself, they were able at the outset to utilize designs from the two earlier fortifications. From these existing plans, fortress pioneers rapidly developed improved bunkers that were built from 1937. This building phase was named the Engineer Construction Programme and was characterized by bunkers built to B1 standard thicknesses (see above). Since the thickness of these structures was soon considered to be too weak and because there was a large number Regelbau designs (and hence confusion), new types were developed and implemented from 1938. These new designs were achieved largely by simplifying and reducing the number of Regelbau types. This new building phase was called the Limes Programme.