Just outside the hamlet of La Boisselle, this enormous crater looks like the site of a meteor impact. Some 100m across and 30m deep, the Lochnagar Crater Memorial (as it's officially known) was created on the morning of the first day of the First Battle of the Somme (1 July 1916) by about 25 tonnes of ammonal laid by British sappers in order to create a breach in the German lines.
La Grande Mine is 4km northeast of Albert along the D929.
