In the park, it becomes obvious that nature does not care about frontiers. This nature reserve, situated on both sides of the Belgian-Dutch border, covers approximately 60 km². Yet, the area exhales infinity and boundlessness, caused by the great diversity in the landscape.
The enormous diversity of this nature reserve is of considerable ecological and cultural-historical value. Here, vast and unspoilt landscapes alternate with heathlands, fens, land dunes, forests, meadows and polders. The reserve is also an irreplaceable breathing space for many people whether visited on foot, by bicycle or on horseback. Rare plants and animals experience peace and quiet here. In short, the reserve offers peace and fertile ground for survival. It is therefore not surprising that Grenspark Kalmthoutse Heide is part of the Natura 2000 network, meant to establish a European network for the sustainable protection of the most important natural areas throughout Europe.