Bunker Use in WW2

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  Casemate Type 623, Koudekerke, The Netherlands.
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  Radio Transmitter Bunker, Spaandam, The Netherlands.
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  Type 669 Heenschemolen, The Netherlands.
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  R636 Fire Control Post, Lekrinckoucke/Zuidcoote, France.
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  SK Observation Tower, Fliegerhorst, Belgium.
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  Type 703, Emminkhuizen, The Netherlands.
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  Type 583a / M 178. Fire Control Post. Heerenduin, Ijmuiden, The Netherlands.
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  Dragon's Teeth Anti Tank Defence, Den Helder, The Netherlands.