A few months ago I began working up another 54mm Great War game. This involved another visit to Verdun - this time a bit further east, near Fort Vaux. This meant I'd need a fort. Big forts were very impressive fashionable things for late 19th century governments to build, but they were very expensive.
I opted to avoid the 'impressive' and 'expensive' elements, and indeed accuracy as I instead hacked about a slab of 2-inch insulation board with a bread knife. Some of the offcuts were used to make the outer banks of defensive ditches. Observation cupolas and a gun turret were added from mdf and the ensemble daubed with emulsion paint. It's pretty ghastly but I think it gets the point across.
Our other Verdun adventures include the left bank, Douamont and of course the real thing!