He thought of the idea to create an educative park which does not just recreate a garden with individual native plants, but shows entire communities or vegetative zones such as meadows, heathland, woodland, etc.
I have been visiting Heemtuin Nieuwkoop in the Netherlands for the last 10 years or so, whenever here on a family visit. You can watch this lovely video on YouTube to see the garden in bird eye view.
Apparently there are about 130 of these type gardens in the Netherlands and 7 in Belgium; some are listed with their localities on the Dutch Webpage here
I will translate some of the information below as the translation is not accurate, but rather about Wildlife Gardens.