Right so a few months ago I saw a report by a guy named Monk about a place they called ‘pic axe alley’ which was under Dover Castle. I really liked the sound of this so we went 11 years after the original report. We didn’t do all of the caponiers but we done the main tunnel system while listening to the tourists above us and overreacting. We then waited for the voices to fade; got out and then played around with the tourists by standing under the windows and then shouting in them while they weren’t looking . Then we left. Great place