These are very old flints, protected in the Natagora site. No fewer than 13 cave entrances follow one another along the path. They are not deep and run along the slope. Chalk was also mined there.
Unexpected place in the middle of the park, next to a viewpoint over the city (see if we will still see this far once the trees have turned green ...), …
The Horstergrub is a dry valley in Dutch South Limburg and the Belgian Voer region in the municipalities of Eijsden-Margraten, Gulpen-Wittem (eastern end) and Voeren.
Beautiful hike to discover the alley of the stairs which has more than 200 limestone steps. It connects Olne to Vaux-sous-Olne and Nessonvaux. This alley was widely used by people …