Climb down Dover’s “Grand Shaft”

Built just over 200 years ago, Dover boasts a 140 feet deep shaft lined with a unique triple staircase, built for the military, and occasionally open to the public.It’s purpose was simple. The military forts were high up in the hills over Dover, but the sea was, well, at sea level, and getting between the two required a long sloping road that was often muddy and dangerous in the wet.
Much quicker for the soldiers if there was a staircase between the two, and Lieutenant-Colonel William Twis