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A big part of Holland or The Netherlands is laying below sea-level and has to be protected against flooding. Therefore there's a protection system consisting of several protection layers. The first protection layer is usually a relative high sea dike. The second layer is a lower dike more inland. Such a lower dike can be seen at this image. At this image you can see more of our protection system against flooding. Hope it's interesting to you and that you'll enjoy this image. PS: image was captured at October, 23th, 2007.