The area is made up out of inliers and outliers. The Huls hill lies on the southern edge of the Plateau of Ubachsberg above the Eyserbeek valley in the south. Between 1 and 2 million years ago it was part of the island of Ubachsberg in the Meuse river. With a height of 215 meters above NAP the Huls hill is one of the highest point in the European part of the Netherlands. It was long believed that the plateau of Ubachsberg was in fact the highest point in the Netherlands, because from the top at Vrouwenheide you can see over the top of the Vaalserberg, to see the even higher hills from the German Eifel.