Perched high on the Famous White Cliffs of Dover the castle is the "Key of England" and has 2000 years of history within its walls. There has been a castle at Dover since the defences of an Anglo-Saxon fortress were strengthened by William of Normandy, who built the first earthwork castle in 1066 before moving on to London. Under Henry II, the castle was rebuilt, including the monumental keep constructed in the 1180s which stands at the heart of a concentric ring of defences. A network of underground WWII tunnels complete with an underground hospital were the nerve centre for Operation Dynamo (the evacuation of the British Force and French troops from Dunkirk). Paranomal activity is reportedly rife in and around the castle with stories a young Drummer Boy who was robbed and beheaded as well as apparitions of Roman soldiers.