Since 1962, the primeval forest of Norg has been owned by Natuurmonumenten and is part of Natura 2000 areas, thus the forest is also designated as a forest reserve. This means that no planting or felling is allowed, allowing nature to take its own course. The first written source was dated around the 16th century. This is probably why the primeval forest of Norg is one of the oldest deciduous forests in the Netherlands. There are also oak trees here that were planted around 1850 and the largest holly tree in Europe is in this forest.