Historic market town of Corsham was restored to some of its previous glory by the BBC team filming Poldark.
under a charming sleepy market town known as Corsham, Wiltshire. is a subterranean "Cold War City." The reason this particular location was chosen for the bunker was its already-extensive system of limestone caves running under the city.
Discover Burlington Bunker in Corsham, England: Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.