That said I was once in Silicon Valley and there were hills on the left and water on the right. Not really much of a valley either.
1. https://en.wikipedia.org/wiki/Food_Valley in Wageningen
2. https://www.healthvalley.nl/ in Nijmegen
3. http://www.metalvalley.eu/nl/home in Brabant
4. https://www.immunovalley.nl/ in Utrecht
5. https://legalvalleynederland.nl/ in Arnhem
6. https://www.energyvalley.nl/ in the northern provinces
If you like partying you can always go to: https://dancevalley.com/
I also live there; but to be honest they could rename it to "Randstad Valley" given the amount of people who are moving here from Amsterdam and Utrecht.