Part of Luxembourg City’s impressive series of fortifications, designated a UNESCO World Heritage site in 1994, the dark, dank Bock Casemates were carved out of a sandstone promontory overlooking the Alzette valley in the sixteenth and seventeenth centuries. The extraordinary complex of underground passages and galleries ran for 23km (17km still remain), and at one time housed a 1200-strong garrison, along with bakeries, kitchens, stables and the like.
