Lochnagar Crater

The Lochnagar mine south of the village of La Boisselle in the Somme département was an underground explosive charge, secretly planted by the British during the First World War, to be ready for 1 July 1916, the first day on the Somme. The mine was dug by the Tunnelling Companies of the Royal Engineers under a German field fortification known as Schwabenhöhe. A large crater survived the war known as the Lochnagar crater or the Trou de mine de La Boisselle.