Catalin H.
Google
This is one of the most captivating tourist spots in the city of Amersfoort (in my view, it is the main attraction).
The local guide is well-prepared, sharing loads of details and patiently answering all the tourists' questions.
For those in good physical shape, and without health concerns (like heart/respiratory issues, or claustrophobia), climbing to the top of the tower is a breeze, especially with breaks on the intermediate floors.
The price is quite reasonable — I'd even say that it's really cheap. The only downside is that some parts of the tower are not open to the public (i.e., the dungeon)