Stuffed with the remnants of an explosives factory, mills, industrial units, asbestos Nissan huts on prefab trench shelter sections, a viaduct 100 feet high and lots and lots and lots of air raid shelters! The best base for a visit is the fab Healey Dell tea rooms, based in a disused police station - if they arent busy and you ask nicely they will show you the old cells.
1940s industrial units, each with a cellar shelter
'Ghost' benches in the cellar shelters
safety lighting with 1940s lightbulb still intact and in place
freestanding shelter entrance
the smaller freestanding shelters
loads more photos as always on the tunnelinspector map: