If you go to the Lochnagar Crater in La Boisselle, do not miss the Glory Hole site (private property), located just next, where you can see the traces of the Great War.
Les Amis de l’îlot de La Boisselle is an association which preserved and values a Battlefield of the First World War in the Somme.
If you want a visit of the Glory Hole, do not hesitate to contact the Association.