Located to the west of Calais city centre, Wn70 Werta back onto the western side of Stp89 Fulda – a railway gun position – and would have provided cover in the gap between Fulda and nearby Stp88 Glan in Fort Nieulay.
The railway line from Fulda would have run alongside the line of buildings at this site as the 28cm gun made its way west towards the other railway gun sites known as Unstrut, Mulheim, and Bremen.
Werta features two Tobruks, a small shelter building, and a communications cable bunker which can all be visited.