ShotHotspot has mapped 7 abandoned places in Den Helder, Provincie Noord-Holland, ranked by how often they're photographed, viewed and voted for. The most popular are Underground Ww2 Bunker, Underground Ww2 Fl250 Bunkers and Bunker Ww1 Ww2 Underground. Some are private property or unsafe, so get permission before you visit.
We don't know whether you're allowed to visit any of these places. Many are private property, closed to the public or unsafe: get permission from the owner or the relevant authority, and take safety precautions.
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