Another one just for the lolz, this is an 18"/45cm #NapoleonicSewerPipe that connects the #SouthernCasemate to the #NorthernCasemate in #Dover near the #Citadel, later to become a detention centre for immigrants.
You literally have to have your arms above your head like a diver as you go in, and then scoot forward a few inches at a time with your toes pushing you.
People have said the thought of this size pipe makes them physically sick, I'm not surprised. :)
#subterraneansaturday #napoleonicsewerpipe #southerncasemate #northerncasemate #dover #citadel #xplore