@crinolinerobot The climb up the Monument is quite something! I nearly gave up near the top because the width of the stairs gets so narrow. The view is amazing though.
There are two plaques nearby that say something about the Great Fire of London. One on a building close by, and another set in the ground that's meant to show the location of the Farriners' bakery where the fire started. I haven't found the second one yet, a car could be parked on top of the spot.