Logo of City Marketing Den Helder with City by the Sea addition

Open Day

Whether you are looking for cultural festivals, music performances, sporting events, lectures or local markets, there is always something to do in Den Helder! Check out our events calendar to stay up to date on what is happening.
Open Day

Offshore Experience

Discover during the fifth Offshore Experience how smart use of space strengthens the future of the North Sea.
Thu 3 Sep '26
  • Theater de Kampanje
    Willemsoord 63, Den Helder
Event  Open Day

Bunker Tour Open Monument Days

Discover the Bunker Tour during Open Monument Days.
Sat 12 Sep '26
  • Willemsoord
    Geen data beschikbaar, Den Helder
Event  Open Day

Kroontjesbunker Open Monument Days

Discover the Kroontjesbunker in the dunes of Huisduinen during the Open Monument Days.
Next date:
Sat 12 Sep '26
Sat 12 Sep 2026
10:00
-5:00 PM

 

  • Kroontjesbunker (FL250)
    Duinweg, Den Helder
Event  Open Day

Helders Museum Open Monument Days

Discover the Helders Museum during Open Monument Days.
Next date:
Sat 12 Sep '26
Sat 12 Sep 2026
12:00
-5:00 PM

 

  • Het Helders museum
    Borneolaan 1, Den Helder
Event  Open Day

Helderse Odd Fellows Open Heritage Days

Discover the Helderse Odd Fellows during the Open Monument Days.
Sat 12 Sep '26
  • Helderse Odd Fellows
    Texelstroomlaan 4, Den Helder
Event  Open Day

The Carillon Open Monument Days

Discover the Carillon during Open Monument Days.
Next date:
Sat 12 Sep '26
Sat 12 Sep 2026
11:00
-4:00 PM

 

  • Het Carillon
    Helden der Zeeplein, Den Helder
Event  Open Day

HNLMS Bonaire | Open Monument Days

Step aboard the former warship the Bonaire
Next date:
Sat 12 Sep '26
Sat 12 Sep 2026
10:00
-5:00 PM

 

  • Stichting Bonaire
    Willemsoord 47, Den helder
Event  Open Day

Masonic Lodge Willem Frederik Karel Open Monument Days

During Open Monument Day, the Freemasons in Den Helder also open their doors.
Sat 12 Sep '26
  • Vrijmetselaarsloge Willem Frederik Karel
    Molengracht 5, Den Helder
View the full events calendar

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