In the heart of the St. Pietersberg

The marl caves in the St. Pietersberg at Maastricht, with old graffiti on the walls, shelters for refugees and a chapel of the Jesuit order. In some places marl is still extracted from the corridors and geologists search for fossils in the caves and cut out pieces of stone. A large cement factory is slowly breaking down part of the mountain. Furthermore, images of houses, churches and castles buil…