Part of the Westwall or Siegfried LIne, this obstacle allows the line of 'dragon's teeth' obstacles to continue while allowing the stream to flow through. It is some 2.5 km from the Belgian border, leaving the village of Lammersdorf on the "wrong" side of the fortifications.
A really good example of this type of obstacle but quite difficult to get to, hidden away in the woods in the bottom of the valley..
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