I saw this vid and it left me wondering, I think the limburg and utrecht part could be true because of the investigations I performed over there 2 years ago and I verified that there are indeed mountains in limburg and rivers in utrecht like in the vid

holland 1 and 2 and zeeland do be true too. friesland 2 as well

THERE IS A FISH DOORBELL IN UTRECHT SO COOL

THERE EVEN IS A WEBSITE IN WHICH YOU CAN SEE PICTURES AND STUFF

https://visdeurbel.nl/en/the-fish-doorbell/

AND THEY EVEN HAVE A YOUTUBE CHANNEL

https://www.youtube.com/@DutchWallFish