The Rochers du Bout du Monde are a natural curiosity of certain geological interest, also classified by the Royal Commission of Monuments and Sites. Located on the right bank of the Ourthe, 7 kilometers south of the city of Liège, from their height of 80 meters they dominate an old meander of the river, the course of which was modified during the construction of the E25 motorway in mid-1970s. Emerging from the Bois d'Embourg, this imposing massif is made up of shelly limestone banks inclined 40 to 45 degrees towards the south. Botanically, it is one of the northernmost xerothermal stations in Wallonia. Calcicolous plants such as the horseshoe grass (Hippocrepis comosa), the mountain libanotis (Seseli libanotis) or the bluish sesleria (Sesleria caerulea) in fact reach the northern limit of their regional area. The exposed rocks also host interesting communities of lichens. Among the fauna, it is worth highlighting the presence of a large population of wall lizards (Podarcis muralis), a rich population of snails and several species of unusual diurnal butterflies. Unfortunately, part of the rocks is gradually being colonized by the invasive false Japanese varnish (Ailanthus altissima), threatening the sustainability of the rock groups. Most of the forest slope including the Rochers du Bout du Monde is registered with the Natura 2000 network in site BE33014 - Vallée de l'Ourthe between Comblain-au-Pont and Angleur.