South Holland
With a bunker as its foundation and on top of a floodbank, Air Guard Tower 5K3 offered a broad view over the Hollandsch Diep and the Mariapolder beyond.
Air watchtower Rossum
One of the 138 Dutch air watchtowers was built in the 1950s right between the rivers Maas and Waal.
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Zeeland
During the Cold War, almost three hundred air watchtowers were scattered throughout the Netherlands to detect enemy aircraft.
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