A system of dry trenches and bastions with bombproof shelters and mine galleries, built between 1773 and 1777 by du Moulin. It makes a nice break from the bustle of the city, being in grassland just outside. You can wander around the fortifications alone or take guided tours on Sundays all year round and Sunday, Monday, Wednesday and Friday in July and August
Entrance on Cabergerweg, on the north-western edge of the city centre. More information on the Maastricht tourist board website: www.vvvmaastricht.nl/Dagjeuit/?lang=en