The Maarten Maartenshuis in Doorn, the Papenkop pumping station or the former town hall of Maartensdijk. Places you may have walked past but never stopped to think about, let alone looked inside. This is possible during Open Monument Day and we have already found a few special stories.
rnl-general-02
From a secret floor in a hiding villa to a mysterious grave: there is a lot to discover during Open Monument Day
