Plofsluis

This lock is part of the new Dutch water line. The wind sluice is the most unique lock in our country. I hear you thinking; and then why? An ingenious system enabled the soil to explode in the event of a threat, so that the sand, gravel and rubble that had been stored in the soil was poured over the Amsterdam-Rhine Canal. The channel was thus closed. The system of the explosive lock also ensured that daily shipping was not hindered by the structure. Unfortunately (or fortunately, depending on how you look at it), this ingenious system was never used; the lock was finally only completed in 1942 and in the meantime another development had gone very quickly: the plane was used in the war. As a result, the lock immediately lost its function.

The Plofsluis is the most unique lock in the Netherlands! The Plofsluis was used to quickly dam the Amsterdam-Rhine Canal in the event of a threat of war to prevent the water from the surrounding areas from flowing away via the canal in the event of inundation.
Source: nl.wikipedia.org/wiki/Plofsluis
Source: rijkswaterstaat.nl/water/waterbeheer/bescherming-tegen-het-water/water defenses/dammen-sluizen-en-stuwen/plofsluis