The medieval Norfolk Towers at the northern end of
Dover Castle viewed from a field adjacent to the hidden East Wing Battery of the
Victorian Fort Burgoyne. The field (no access without permission) is where part of the French army were arrayed during the Great Siege of 1216:

(Click this Dover Castle Norfolk Towers text link to see the largest size)
The ivy-clad
Norfolk Towers are in the fobidden zone that surrounds the entire perimeter of the castle. Despite their massive size, if this photo were to be mixed with half-a-dozen photos of other Norman castles, then I would be very surprised if the average Dovorian "man or woman in the street" would recognize that the Norfolk Towers are part of the ancient monument they see almost every day.
This post-sunrise zoomed photo of 400 yards was taken at 6.48 am on Monday, 27th of June, 2011. The flag-pole and collection of chimney stacks at top-left are part of Constable's Gateway (alt. Constable's Tower), 120 yards beyond the Norfolk Towers. The
British Army flag is that of "Deputy Constable of Dover Castle". On a less-hazy day, the
English Channel is visible above the skyline to the right of the towers.
The main entrance to Dover Castle prior to the 1216 Siege of Dover Castle (
First Barons War) was the Northern Entrance (North Entrance, or Northgate).
During the siege, which broke off and then resumed briefly in 1217 when a trebuchet catapult was used (french:
Malvoisin, or "Bad Neighbour"), the engineers of the Dauphin (Prince Louis, later
Louis VIII of France) so damaged the eastern gate tower of the North Entrance by mining that
Hubert de Burgh (Constable of Dover Castle under
King John and
Henry III) subsequently sealed the gateway, replacing it with the Norfolk Towers, and new entrances were made at Constable's Gate (in the west) and Fitzwilliam's Gate (alt. Fitzwilliam's Gateway, Fitzwilliam's Tower; in the east: a postern, or secondary entrance).