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Caves of Mount St. Pieter
Dating back to Roman times, the caves are an complicated labyrinth of thousands of man-made passages. The caves are the result of centuries of excavation of sandstone. The walls are covered with drawings and signatures, some of which go back to pre-historic times.
Casemates
Between 1575 and 1825, mining activities created a network of galleries at Maastricht’s western limits. These mining galleries were used in times of siege for subterranean approach and elimination of the enemy. The casemates is a unique military monument with its domed vaults, impressive shellproof refuges, powder rooms, plunging steps and a variety of galleries.