Advice wanted on unusual Cultural Events in the BE-NL Delta area

From Belgian residents, we are looking for all kinds of advice and info about cultural events;

Info for the less-well-known museums, ones that are off-the-beaten track, also Art Nouveau / Jugendstil architecture, plus contemporary design and maybe a bit of fashion…

*Advance* news of art exhibitions, esp’ the famous painters / artists from here – but nearby too, if exceptional (for example we missed the [Vivian Maier exh’ in Paris](https://museeduluxembourg.fr/en/agenda/evenement/vivian-maier), hence this request).

Any recommended links would be great to know of as well, more / too many is good!

On google, [here’s the area](https://goo.gl/maps/G8T4mn3GzU9XL8Pg8) (about 100km radius from Goes, NL) that we very much like.

We’re new to the area, living in Antwerp (she, only recently) and Rotterdam (he, since 2016).

The area of the BE-NL Delta / Rijn-Maas-Scheldedelta, to English speakers, seems to have various names – we’d be grateful to know the Belgians’ preferred term for the particular area on the G-map that *includes* Rotterdam/Delft.

We have *some* familiarity, for instance…

* We know Bruges is now, sadly, super touristy 
* We know Ghent has terrific brand new cycling infra, and is a university town 
* We know some of the Dutch parts reasonably well now (Delft, Schiedam, Rotterdam especially).

We searched the Antwerp Reddit but, we hope posting the Q here will reach a wider audience, and be better than asking on the individual cities redds. 

Thanks in advance!