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De Helderse Vallei is a centre for nature and environmental education along the dunes of Den Helder. It is situated between the Donkere Duinen woodlands and De Helderse Duinen nature reserve and is the gateway to the Mariendal recreation area. An open air theatre, an observation tower, De Klimvallei eco-climbing park and a children’s farm can be found next to the Visitors’ Centre.

De Helderse Vallei has been realized thanks to the European Agricultural Fund for Rural Development: Europe invests in rural areas.