La Malogne is a former phosphate mine which operated between 1876 and 1925. Underground galleries extend to around 199 hectares, making it one of the largest underground sites in Belgium. Artefacts that remain include rails and mineral trucks. The extracted phosphate was used in agriculture.
After closure, the site was used for mushroom growing and a number of bats have taken up residence. Lower levels of the mine are flooded. Tours can sometimes be arranged for groups through local enthusiasts. When Sub Brit visited in 2003 a special ‘La Malogne’ beer was drunk in the undergound galleries.