Good morning Susana,
Imbolc blessings to you!
I work a few days a week in Oud Zuid andsometimes wander around looking for herbs. There are quite a lot, think of the street trees (some Gingko in that area), Beatrix Park(has an interesting herb garden) and the general inbetween places (such as opposite by workplace – there is the Tram museum and the long pathway past Giddeon Italiander heading to the sports fields – loads of interesting plants there).
In Amsterdamse Bos, the park wardens/boswachters are quite hot on telling people not to forage. A lot of people apparently try and if caught they are told off. I avoid the Bos for that reason.
Nieuwe Meer – Occasionally swim in it as a friend lives on the edge, not foraged in that area but there are always interesting plants to find – everywhere 🙂
Let us know how you get on.