Den Helder, the Helderse sea dike (Zeedijk) as seen from Fort Erfprins looking towards the harbour.

Den Helder, the Helderse sea dike (Zeedijk) as seen from Fort Erfprins looking towards the harbour.

Den Helder, the Helderse sea dike (Zeedijk) as seen from Fort Erfprins looking towards the harbour.

Den Helder, the Helderse Zeedijk, is originally a weaker dike that was built in 1584, after the dune area disappeared it became a sea dike that was constantly strengthened over the years, so the construction of the closing dike led to the installation of a retaining wall which disappeared under the dike after it was raised to Delta height in the 70s..© 30 juni 2018 Marco van Middelkoop/Aerophoto-Schiphol

Aerial photography library ID: 304694
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